CVE-2026-61560

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-16. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-80008 (ENISA EUVD) · GHSA-cv3r-c5h8-f4g5 (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
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: 2.9%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Prior to version 2.1.27, the SSE transport mode (SSE=true) exposes all MCP tools without any authentication. The upload_markdown tool reads arbitrary files from the server's local filesystem via an unsanitized file_path parameter and uploads them to a GitLab project. Combined, any unauthenticated network-reachable attacker can read /proc/self/environ to steal the server's GITLAB_PERSONAL_ACCESS_TOKEN and achieve full GitLab account takeover. This is the default configuration for Docker deployments. Version 2.1.27 contains a patch.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 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.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (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 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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.9%
EPSS %ILE
87th
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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
2.9% 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days 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.

A fix is available. 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 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.

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

September 15, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Nov 8, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr.
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Unauthenticated arbitrary file read via `upload_markdown` enables PAT exfiltration and full account takeover · Advisory · zereight/gitlab-mcp · GitHub

https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5
GitHub pull request Patch Available

docs: document GHSA-cv3r-c5h8-f4g5 security fix

Patch available: zereight/gitlab-mcp v2.2.0 (PR #622 merged 2026-07-26)

https://github.com/zereight/gitlab-mcp/pull/622
GitHub pull request Patch Available

fix: guard exposed SSE transport

Patch available: zereight/gitlab-mcp v2.2.0 (PR #554 merged 2026-06-22)

https://github.com/zereight/gitlab-mcp/pull/554
GitHub pull request Patch Available

fix: make download and upload work for remote deployments

Patch available: zereight/gitlab-mcp v2.2.0 (PR #482 merged 2026-05-21)

https://github.com/zereight/gitlab-mcp/pull/482

Vendor Advisories for CVE-2026-61560(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npm@zereight/mcp-gitlab @ 2.1.27 (fixes < 2.1.27)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@zereight/mcp-gitlab—
  • every version up to 2.1.27: fixed in 2.1.27
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 44× 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.

Showing the most recent 100 of 131 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 31 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 19:35 UTCEchelonGraph re-scored
  2. 2026-11-12 19:35 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-12 16:34 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  4. 2026-11-11 19:19 UTCEchelonGraph re-scored
  5. 2026-11-11 19:19 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-11 16:40 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  7. 2026-11-10 18:59 UTCEchelonGraph re-scored
  8. 2026-11-10 18:59 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-10 16:45 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  10. 2026-11-09 18:42 UTCEchelonGraph re-scored
  11. 2026-11-09 18:42 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-09 16:35 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  13. 2026-11-08 18:26 UTCEchelonGraph re-scored
  14. 2026-11-08 18:26 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-08 16:40 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  16. 2026-11-07 18:09 UTCEchelonGraph re-scored
  17. 2026-11-07 18:09 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-07 16:39 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  19. 2026-11-06 17:52 UTCEchelonGraph re-scored
  20. 2026-11-06 17:52 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-11-06 16:39 UTCEPSS rescoreEPSS 2.9% · 87th percentile
  22. 2026-11-06 14:25 UTCOSV refresh
  23. 2026-11-05 17:35 UTCEchelonGraph re-scored
  24. 2026-11-05 17:35 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-11-05 16:38 UTCEPSS rescoreEPSS 2.9% · 87th percentile
Show 75 more
  1. 2026-11-04 17:18 UTCEchelonGraph re-scored
  2. 2026-11-04 17:18 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-04 16:36 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  4. 2026-11-03 17:01 UTCEchelonGraph re-scored
  5. 2026-11-03 17:01 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-03 16:48 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  7. 2026-11-02 16:45 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  8. 2026-11-02 16:44 UTCEchelonGraph re-scored
  9. 2026-11-02 16:44 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-11-01 16:35 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  11. 2026-11-01 16:09 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-01 07:41 UTCGHSA enrichmentGHSA-cv3r-c5h8-f4g5 · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-11-01 07:41 UTCEchelonGraph re-scored
  14. 2026-10-31 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  15. 2026-10-31 15:48 UTCEchelonGraph re-scored
  16. 2026-10-30 16:34 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  17. 2026-10-30 15:30 UTCEchelonGraph re-scored
  18. 2026-10-29 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  19. 2026-10-29 15:14 UTCEchelonGraph re-scored
  20. 2026-10-28 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  21. 2026-10-28 14:57 UTCEchelonGraph re-scored
  22. 2026-10-27 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  23. 2026-10-27 14:22 UTCEchelonGraph re-scored
  24. 2026-10-26 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  25. 2026-10-26 13:52 UTCEchelonGraph re-scored
  26. 2026-10-25 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  27. 2026-10-25 14:14 UTCEchelonGraph re-scored
  28. 2026-10-25 13:12 UTCEchelonGraph re-scored
  29. 2026-10-24 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  30. 2026-10-24 12:55 UTCEchelonGraph re-scored
  31. 2026-10-23 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  32. 2026-10-23 12:35 UTCEchelonGraph re-scored
  33. 2026-10-22 16:35 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  34. 2026-10-22 12:13 UTCEchelonGraph re-scored
  35. 2026-10-21 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  36. 2026-10-21 11:57 UTCEchelonGraph re-scored
  37. 2026-10-20 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  38. 2026-10-20 11:40 UTCEchelonGraph re-scored
  39. 2026-10-19 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  40. 2026-10-19 11:22 UTCEchelonGraph re-scored
  41. 2026-10-18 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  42. 2026-10-18 03:25 UTCEchelonGraph re-scored
  43. 2026-10-17 16:35 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  44. 2026-10-17 07:37 UTCEchelonGraph re-scored
  45. 2026-10-16 16:43 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  46. 2026-10-16 07:18 UTCEchelonGraph re-scored
  47. 2026-10-15 16:32 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  48. 2026-10-15 06:13 UTCEchelonGraph re-scored
  49. 2026-10-14 16:33 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  50. 2026-10-14 01:50 UTCEchelonGraph re-scored
  51. 2026-10-13 16:34 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  52. 2026-10-12 22:05 UTCEchelonGraph re-scored
  53. 2026-10-12 16:34 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  54. 2026-10-12 15:50 UTCEchelonGraph re-scored
  55. 2026-10-11 19:34 UTCEchelonGraph re-scored
  56. 2026-10-11 16:49 UTCEchelonGraph re-scored
  57. 2026-10-11 14:11 UTCEchelonGraph re-scored
  58. 2026-10-11 13:49 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  59. 2026-10-11 09:21 UTCEchelonGraph re-scored
  60. 2026-10-10 22:49 UTCEchelonGraph re-scored
  61. 2026-10-10 20:00 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  62. 2026-10-09 22:57 UTCEchelonGraph re-scored
  63. 2026-10-09 20:07 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  64. 2026-10-08 20:54 UTCEchelonGraph re-scored
  65. 2026-10-08 17:13 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  66. 2026-10-08 02:22 UTCEchelonGraph re-scored
  67. 2026-10-07 23:48 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  68. 2026-10-06 16:06 UTCEchelonGraph re-scored
  69. 2026-10-06 15:18 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  70. 2026-10-05 20:17 UTCEchelonGraph re-scored
  71. 2026-10-05 17:43 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  72. 2026-10-03 16:35 UTCEchelonGraph re-scored
  73. 2026-10-03 14:26 UTCEPSS rescoreEPSS 2.9% · 86th percentile
  74. 2026-10-02 19:04 UTCEchelonGraph re-scored
  75. 2026-10-02 17:56 UTCEPSS rescoreEPSS 2.9% · 86th percentile

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-2026-61560.yaml
    Published Sep 28, 2026

    GitLab MCP Server < 2.1.27 - Unauthenticated SSE Transport Access

    Open source ↗

Related CVEs(same product + same CWE)

Same product

2 shown

npm:@zereight/mcp-gitlab

Frequently asked(5)

What is CVE-2026-61560?
CVE-2026-61560 is a critical-severity vulnerability; its CVE record was published on September 15, 2026. @zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Prior to version 2.1.27, the SSE transport mode (SSE=true) exposes all MCP tools without any authentication. The upload_markdown tool reads arbitrary files from the server's local filesystem via an unsanitized file_path parameter…
When was the CVE record for CVE-2026-61560 published?
The CVE record for CVE-2026-61560 was published on September 15, 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 September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-61560 actively exploited?
CVE-2026-61560 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.9% probability of exploitation in the next 30 days (87th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61560?
CVE-2026-61560 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-61560?
A fix for CVE-2026-61560 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-61560 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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