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CVE-2026-12537

Improper Neutralization used in an OS Command in the container launcher in Google Gemini CLI (versions prior to 0.39.1) and run-gemini-cli GitHub Action (versions prior to 0.1.22) on headless CI platforms allows an unprivileged attacker to achieve pre-sandbox host-level code execution a maliciously crafted .gemini/.env file.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bad877982d584cd1650e17f4d0647ab1b7115c69c28c11ad81340a5846688408
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Gemini CLI","vendor":"Google Cloud","versions":[{"lessThan":"0.39.1","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /containers/cna/affected/0

{"defaultStatus":"unaffected","product":"run-gemini-cli GitHub Action","vendor":"Google Cloud","versions":[{"lessThan":"0.1.22","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Gemini CLI","vendor":"Google Cloud","versions":[{"lessThan":"0.39.1","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /containers/cna/affected/0
{"defaultStatus":"unaffected","product":"run-gemini-cli GitHub Action","vendor":"Google Cloud","versions":[{"lessThan":"0.1.22","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":10,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"CLEAR","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Clear","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpa…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://github.com/google-github-actions/run-gemini-cli/security/advisories/GHSA-wpqr-6v78-jr5g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c0cd8dbba6a45b46a720721f09c094ec89df88c4019f8780557c2b460122ff5 · sha256:a904549ea9b1429a… · /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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