CVE-2026-61559: Dynamic API URL redirection flaw in mcp-gitlab
@zereight/mcp-gitlab
The mcp-gitlab Model Context Protocol server accepts unvalidated dynamic API base URLs via request headers and attaches private tokens to outgoing requests. This allows arbitrary callers to intercept sensitive API tokens.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 9.6
- EPSS
- <0.01 · top 63% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 15 Sep 2026
- last update
- 15 Sep 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-09-15CVE-2026-61559: `@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab.NVD · nvd.nist.gov/vuln/detail/CVE-2026-61559
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerabilityAgent hijack
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply ChainLLM06:2025 Excessive Agency
- mitre atlas
- AML.T0053 AI Agent Tool Invocation
- dates
- happened 15 Sep 2026 · first reported 15 Sep 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
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the brief as text
# CVE-2026-61559: Dynamic API URL redirection flaw in mcp-gitlab https://gcdradar.vercel.app/incidents/cve-2026-61559-dynamic-api-url-redirection-flaw-in-mcp-gitla · AIR-2026-0121 · closed 2026-09-15 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-09-15 - AI role: Attack on AI - Products: @zereight/mcp-gitlab - CVE ids: CVE-2026-61559 - CVSS: 9.6 ## Summary The mcp-gitlab Model Context Protocol server accepts unvalidated dynamic API base URLs via request headers and attaches private tokens to outgoing requests. This allows arbitrary callers to intercept sensitive API tokens. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-09-15: CVE-2026-61559: `@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. (https://nvd.nist.gov/vuln/detail/CVE-2026-61559) ## Sources - 2026-09-15 NVD: CVE-2026-61559: `@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. https://nvd.nist.gov/vuln/detail/CVE-2026-61559 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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