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CVE-2026-27735

Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). In mcp-server-git versions prior to 2026.1.14, the git_add tool did not validate that file paths provided in the files argument were within the repository boundaries. Because the tool used GitPython's repo.index.add() rather than the Git CLI, relative paths containing `../` sequences that resolve outside the repository were accepted and staged into the Git index. Users are advised to
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:158ecc3a3eaa618074417687d15fe0f272b182abae948d6f4fe2c731b5836d8a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"servers","vendor":"modelcontextprotocol","versions":[{"status":"affected","version":"< 2026.1.14"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d4074a898824cf0e4d03f40b84ccae87d5f0515c26a1f446005edfc83f1ddb08 · sha256:4dd5ae3cc61ba6e1… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.4,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d4074a898824cf0e4d03f40b84ccae87d5f0515c26a1f446005edfc83f1ddb08 · sha256:4dd5ae3cc61ba6e1… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d4074a898824cf0e4d03f40b84ccae87d5f0515c26a1f446005edfc83f1ddb08 · sha256:4dd5ae3cc61ba6e1… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/modelcontextprotocol/servers/pull/3164","tags":["x_refsource_MISC"],"url":"https://github.com/modelcontextprotocol/servers/pull/3164"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d4074a898824cf0e4d03f40b84ccae87d5f0515c26a1f446005edfc83f1ddb08 · sha256:4dd5ae3cc61ba6e1… · /containers/cna/references/1
{"name":"https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-vjqx-cfc4-9h6v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-vjqx-cfc4-9h6v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d4074a898824cf0e4d03f40b84ccae87d5f0515c26a1f446005edfc83f1ddb08 · sha256:4dd5ae3cc61ba6e1… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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