CVE-2026-81735

CRITICALPre-NVD 10.010.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. The CNA's CVSS baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory

Also known asEUVD-2026-67078 (ENISA EUVD) · GHSA-p68p-fq8j-3639 (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPlan mitigationThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 10.0Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

startServer.ts in the mcp-http-server package of UI-TARS-desktop defaulted its listen address to '::' when no host was given, so startSseAndStreamableHttpMcpServer bound the Streamable HTTP and SSE MCP transports to every interface, and its authentication middleware was optional: middlewares are applied only when a caller supplies them. The @agent-infra/mcp-server-commands and @agent-infra/mcp-server-filesystem entry points call startSseAndStreamableHttpMcpServer with a host and port alone and pass no middleware, so neither server required a credential. The commands server exposes a run_command tool that hands its caller-supplied command string to promisify(child_process.exec), so any unauthenticated client able to reach the port could run arbitrary commands as the user running the server, and the filesystem server exposed its file read and write tools on the same terms. The listen default became 127.0.0.1 in commit c2ad42e3eb9b27830db41a3e6f51ca7179d9b168; the package version stayed at 1.2.4 across that change, so the boundary is the commit rather than a release.

CVSS
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 27, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Nov 6, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
Web page

UI-TARS-desktop @agent-infra MCP Servers Bind Every Interface Without Authentication, Exposing Arbitrary Command Execution | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ui-tars-desktop-agent-infra-mcp-servers-bind-every-interface-without-authentication-exposing-arbitrary-command-execution
Web page

UI-TARS-desktop/packages/agent-infra/mcp-http-server/src/startServer.ts at e9f3387288da4af2ad99972da2ac916cdabce093 · bytedance/UI-TARS-desktop · GitHub

https://github.com/bytedance/UI-TARS-desktop/blob/e9f3387288da4af2ad99972da2ac916cdabce093/packages/agent-infra/mcp-http-server/src/startServer.ts#L263
Web page

GitHub - bytedance/UI-TARS-desktop: The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra · GitHub

https://github.com/bytedance/UI-TARS-desktop
GitHub commit

commit c2ad42e3eb9b (bytedance/UI-TARS-desktop)

Fix landed in bytedance/UI-TARS-desktop commit c2ad42e3eb9b — awaiting tagged release

https://github.com/bytedance/UI-TARS-desktop/commit/c2ad42e3eb9b27830db41a3e6f51ca7179d9b168
GitHub pull request

fix(mcp-http-server): default host to 127.0.0.1, not all interfaces

Fix merged in bytedance/UI-TARS-desktop PR #1918 on 2026-07-01 — awaiting tagged release

https://github.com/bytedance/UI-TARS-desktop/pull/1918

Vendor Advisories for CVE-2026-81735(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 60× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 445 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 345 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-11-12 23:57 UTCEchelonGraph re-scored
  3. 2026-11-12 23:57 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  4. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  5. 2026-11-12 00:36 UTCEchelonGraph re-scored
  6. 2026-11-12 00:36 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  7. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  8. 2026-11-11 01:15 UTCEchelonGraph re-scored
  9. 2026-11-11 01:15 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  10. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  11. 2026-11-10 01:48 UTCEchelonGraph re-scored
  12. 2026-11-10 01:48 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  13. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  14. 2026-11-09 02:27 UTCEchelonGraph re-scored
  15. 2026-11-09 02:27 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  16. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  17. 2026-11-08 03:06 UTCEchelonGraph re-scored
  18. 2026-11-08 03:06 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  19. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  20. 2026-11-07 03:45 UTCEchelonGraph re-scored
  21. 2026-11-07 03:45 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  22. 2026-11-06 19:25 UTCOSV refresh
  23. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  24. 2026-11-06 04:24 UTCEchelonGraph re-scored
  25. 2026-11-06 04:24 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
Show 75 more
  1. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-11-05 05:02 UTCEchelonGraph re-scored
  3. 2026-11-05 05:02 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  4. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  5. 2026-11-04 05:40 UTCEchelonGraph re-scored
  6. 2026-11-04 05:40 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  7. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  8. 2026-11-03 06:19 UTCEchelonGraph re-scored
  9. 2026-11-03 06:19 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  10. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  11. 2026-11-02 06:57 UTCEchelonGraph re-scored
  12. 2026-11-02 06:57 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  13. 2026-11-01 07:36 UTCEchelonGraph re-scored
  14. 2026-11-01 07:36 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  15. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-10-31 08:14 UTCEchelonGraph re-scored
  17. 2026-10-31 08:14 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  18. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  19. 2026-10-30 08:53 UTCEchelonGraph re-scored
  20. 2026-10-30 08:53 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  21. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-10-29 09:32 UTCEchelonGraph re-scored
  23. 2026-10-29 09:32 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  24. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  25. 2026-10-28 10:12 UTCEchelonGraph re-scored
  26. 2026-10-28 10:12 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  27. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  28. 2026-10-27 09:54 UTCEchelonGraph re-scored
  29. 2026-10-27 09:54 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  30. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  31. 2026-10-26 10:34 UTCEchelonGraph re-scored
  32. 2026-10-26 10:33 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  33. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  34. 2026-10-25 13:58 UTCEchelonGraph re-scored
  35. 2026-10-25 11:11 UTCEchelonGraph re-scored
  36. 2026-10-25 11:11 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  37. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  38. 2026-10-24 11:50 UTCEchelonGraph re-scored
  39. 2026-10-24 11:50 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  40. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  41. 2026-10-23 12:28 UTCEchelonGraph re-scored
  42. 2026-10-23 12:28 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  43. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  44. 2026-10-22 13:06 UTCEchelonGraph re-scored
  45. 2026-10-22 13:06 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  46. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  47. 2026-10-21 13:44 UTCEchelonGraph re-scored
  48. 2026-10-21 13:44 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  49. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  50. 2026-10-20 14:22 UTCEchelonGraph re-scored
  51. 2026-10-20 14:21 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  52. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  53. 2026-10-19 13:23 UTCEchelonGraph re-scored
  54. 2026-10-19 13:23 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  55. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  56. 2026-10-18 12:57 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  57. 2026-10-18 03:09 UTCEchelonGraph re-scored
  58. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  59. 2026-10-17 13:36 UTCEchelonGraph re-scored
  60. 2026-10-17 13:35 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  61. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  62. 2026-10-16 14:13 UTCEchelonGraph re-scored
  63. 2026-10-16 14:12 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  64. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  65. 2026-10-15 14:01 UTCEchelonGraph re-scored
  66. 2026-10-15 14:00 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  67. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  68. 2026-10-14 08:50 UTCEchelonGraph re-scored
  69. 2026-10-14 08:50 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  70. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  71. 2026-10-13 04:43 UTCEchelonGraph re-scored
  72. 2026-10-13 04:43 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0
  73. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  74. 2026-10-12 14:56 UTCEchelonGraph re-scored
  75. 2026-10-12 05:21 UTCGHSA enrichmentGHSA-p68p-fq8j-3639 · GitHub severity CRITICAL · GitHub CVSS 10.0

Frequently asked(5)

What is CVE-2026-81735?
CVE-2026-81735 is a critical-severity vulnerability; its CVE record was published on August 27, 2026. startServer.ts in the mcp-http-server package of UI-TARS-desktop defaulted its listen address to '::' when no host was given, so startSseAndStreamableHttpMcpServer bound the Streamable HTTP and SSE MCP transports to every interface, and its authentication middleware was optional: middlewares are…
When was CVE-2026-81735 made public?
CVE-2026-81735 was made public on July 1, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 27, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-81735 actively exploited?
CVE-2026-81735 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81735?
CVE-2026-81735 has a CVSS base score of 10.0 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-81735?
An upstream fix for CVE-2026-81735 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-81735 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-81735

Explore →

Is Your Infrastructure Affected by CVE-2026-81735?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.