CVE-2026-105740

CRITICALPre-NVD 9.99.9
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 3.9% (90th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-92799 (ENISA EUVD)Source: ENISA EUVD

9.9EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 3.9%CVSS: 9.9Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exec {command}" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
61
EG Risk 61/100

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)
Severity99% × 45%
Impact severity (EG Severity): CVSS 9.9 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
3.9%
EPSS %ILE
90th
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 (9.9): severity, escalated by confirmed exploitation. This CVE's 9.9 is its impact severity (EG Severity), not escalated.

EG Severity
9.9 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
3.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-13). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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, Track* at medium and Attend at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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

October 5, 2026

Last Modified

October 6, 2026

Advisory Details (4)

Auto-updated Nov 6, 2026
🔬 Proof of concept available. Fix named in the CVE record. Sources: github, github_commit, github_pr.
GitHub advisoryMentions a patch (unverified)

Langflow < 1.10.3: OS command injection (RCE) via arbitrary command in MCP stdio server configuration · Advisory · langflow-ai/langflow · GitHub

https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server · Advisory · langflow-ai/langflow · GitHub

https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2
GitHub pull request

fix: prevent MCP command injection via allowlist validation (CWE-78)

Fix merged in langflow-ai/langflow PR #12290 on 2026-03-27 — awaiting tagged release

https://github.com/langflow-ai/langflow/pull/12290
GitHub commit

commit efbc4a16e639 (langflow-ai/langflow)

Fix landed in langflow-ai/langflow commit efbc4a16e639 — awaiting tagged release

https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 v3 → 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.

  1. 2026-11-13 19:12 UTCEchelonGraph re-scored
  2. 2026-11-13 16:50 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  3. 2026-11-12 17:54 UTCEchelonGraph re-scored
  4. 2026-11-12 16:32 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  5. 2026-11-11 17:42 UTCEchelonGraph re-scored
  6. 2026-11-11 16:37 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  7. 2026-11-10 17:29 UTCEchelonGraph re-scored
  8. 2026-11-10 16:41 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  9. 2026-11-09 17:18 UTCEchelonGraph re-scored
  10. 2026-11-09 16:34 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  11. 2026-11-08 17:07 UTCEchelonGraph re-scored
  12. 2026-11-08 16:38 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  13. 2026-11-07 16:56 UTCEchelonGraph re-scored
  14. 2026-11-07 16:38 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  15. 2026-11-06 16:45 UTCEchelonGraph re-scored
  16. 2026-11-06 16:35 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  17. 2026-11-05 21:55 UTCOSV refresh
  18. 2026-11-05 16:36 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  19. 2026-11-05 16:34 UTCEchelonGraph re-scored
  20. 2026-11-04 16:34 UTCEPSS rescoreEPSS 3.9% · 90th percentile
  21. 2026-11-04 16:20 UTCEchelonGraph re-scored
  22. 2026-11-03 16:46 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  23. 2026-11-03 16:08 UTCEchelonGraph re-scored
  24. 2026-11-02 16:43 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  25. 2026-11-02 15:54 UTCEchelonGraph re-scored
Show 61 more
  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  2. 2026-11-01 15:42 UTCEchelonGraph re-scored
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  4. 2026-10-31 15:31 UTCEchelonGraph re-scored
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  6. 2026-10-30 15:19 UTCEchelonGraph re-scored
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  8. 2026-10-29 15:08 UTCEchelonGraph re-scored
  9. 2026-10-28 16:31 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  10. 2026-10-28 14:56 UTCEchelonGraph re-scored
  11. 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  12. 2026-10-27 14:24 UTCEchelonGraph re-scored
  13. 2026-10-26 16:30 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  14. 2026-10-26 14:06 UTCEchelonGraph re-scored
  15. 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.0% · 64th percentile
  16. 2026-10-25 14:55 UTCEchelonGraph re-scored
  17. 2026-10-25 13:27 UTCEchelonGraph re-scored
  18. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-10-24 13:15 UTCEchelonGraph re-scored
  20. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  21. 2026-10-23 13:02 UTCEchelonGraph re-scored
  22. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-22 12:51 UTCEchelonGraph re-scored
  24. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-21 12:39 UTCEchelonGraph re-scored
  26. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  27. 2026-10-20 12:27 UTCEchelonGraph re-scored
  28. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  29. 2026-10-19 12:13 UTCEchelonGraph re-scored
  30. 2026-10-18 05:08 UTCEchelonGraph re-scored
  31. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  32. 2026-10-17 08:18 UTCEchelonGraph re-scored
  33. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  34. 2026-10-16 08:05 UTCEchelonGraph re-scored
  35. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  36. 2026-10-15 07:07 UTCEchelonGraph re-scored
  37. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  38. 2026-10-14 03:00 UTCEchelonGraph re-scored
  39. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  40. 2026-10-12 16:39 UTCEchelonGraph re-scored
  41. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  42. 2026-10-11 20:15 UTCEchelonGraph re-scored
  43. 2026-10-11 16:38 UTCEchelonGraph re-scored
  44. 2026-10-11 15:01 UTCEchelonGraph re-scored
  45. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  46. 2026-10-11 12:50 UTCEchelonGraph re-scored
  47. 2026-10-10 21:34 UTCEchelonGraph re-scored
  48. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  49. 2026-10-09 22:52 UTCEchelonGraph re-scored
  50. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  51. 2026-10-08 19:40 UTCEchelonGraph re-scored
  52. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  53. 2026-10-08 01:48 UTCEchelonGraph re-scored
  54. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  55. 2026-10-06 19:37 UTCEchelonGraph re-scored
  56. 2026-10-06 18:42 UTCEchelonGraph re-scored
  57. 2026-10-06 15:23 UTCEchelonGraph re-scored
  58. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  59. 2026-10-05 21:22 UTCEchelonGraph re-scored
  60. 2026-10-05 21:08 UTCEchelonGraph re-scoredFirst assessed: 9.9 CRITICAL
  61. 2026-10-05 21:05 UTCMITRE cvelistV5first tracked

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2026/CVE-2026-105740.yaml
    Recorded Nov 3, 2026

    Langflow 1.8.3 and 1.9.0 - Authenticated MCP Stdio Command Execution

    Open source ↗

Frequently asked(5)

What is CVE-2026-105740?
CVE-2026-105740 is a critical-severity vulnerability; its CVE record was published on October 5, 2026. Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c…
When was the CVE record for CVE-2026-105740 published?
The CVE record for CVE-2026-105740 was published on October 5, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 6, 2026; the record at its source may have been updated since.
Is CVE-2026-105740 actively exploited?
CVE-2026-105740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.9% probability of exploitation in the next 30 days (90th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-105740?
CVE-2026-105740 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-105740?
The CVE record for CVE-2026-105740 names the fix: "This vulnerability is fixed in 1.9.0."

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-105740

Explore →

Is Your Infrastructure Affected by CVE-2026-105740?

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