CVE-2026-85626 json
git-mcp-server 2.15.1 Argument Injection via Git Ref Parameters
published 2026-09-04 2 mo ago modified 2026-10-01 38 d ago also EUVD-2026-71233
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
Summary
git-mcp-server 2.15.1 contains an argument injection vulnerability in the ref and object parameters of git_log, git_diff, and git_show tools that lack leading-dash validation. Attackers can inject git command-line options like --output= to write files outside the repository to arbitrary paths accessible by the process.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/cyanheads/git-mcp-server/issues/53 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- cyanheads git-mcp-server
Classification
- Weakness
-
- CWE-88 Improper Neutralization of Argument Delimiters in a Command
References
-
github.com
/cyanheads/git-mcp-server/issues/53
issue-tracking, exploit
-
github.com
/cyanheads/git-mcp-server
product
-
github.com
/cyanheads/git-mcp-server/blob/v2.15.3/src/services/git/providers/cli/operations/commits/log.ts
technical-description
-
github.com
/cyanheads/git-mcp-server/blob/v2.15.3/src/services/git/providers/cli/utils/command-builder.ts
technical-description
-
vulncheck.com
/advisories/git-mcp-server-2.15.1-argument-injection-via-git-ref-parameters
third-party-advisory
Sources
- CVE List CVE-2026-85626
- NVD CVE-2026-85626
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