CVE-2026-85626: high-severity vulnerability in cyanheads git-mcp-server
git-mcp-server 2.15.1 Argument Injection via Git Ref Parameters
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.5%
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.
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
Affected products
cyanheads · git-mcp-serverRelated CVEs — cyanheads git-mcp-server
In the same product, most dangerous first.
References
https://github.com/cyanheads/git-mcp-serverhttps://github.com/cyanheads/git-mcp-server/blob/v2.15.3/src/services/git/providers/cli/operations/commits/log.tshttps://github.com/cyanheads/git-mcp-server/blob/v2.15.3/src/services/git/providers/cli/utils/command-builder.tshttps://github.com/cyanheads/git-mcp-server/issues/53https://www.vulncheck.com/advisories/git-mcp-server-2.15.1-argument-injection-via-git-ref-parameters