CVE Explorer

CVE-2026-29783

The shell tool within GitHub Copilot CLI versions prior to and including 0.0.422 can allow arbitrary code execution through crafted bash parameter expansion patterns. An attacker who can influence the commands executed by the agent (e.g., via prompt injection through repository files, MCP server responses, or user instructions) can exploit bash parameter transformation operators to execute hidden commands, bypassing the safety assessment that classifies commands as "read-only." This has been pat

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fbfae9ac650fc119629a6302d4bbdb620eea666dc35d2366f9a118f6a9d20369

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"copilot-cli","vendor":"github","versions":[{"status":"affected","version":"<= 0.0.422"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:563692f8e552bd04ac5cad29b010a380d07e5c2b41dc270f9db31b6769f8f0e3 · sha256:f84f7b9603465a58… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.5,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:563692f8e552bd04ac5cad29b010a380d07e5c2b41dc270f9db31b6769f8f0e3 · sha256:f84f7b9603465a58… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-78","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:563692f8e552bd04ac5cad29b010a380d07e5c2b41dc270f9db31b6769f8f0e3 · sha256:f84f7b9603465a58… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/github/copilot-cli/releases/tag/v0.0.423","tags":["x_refsource_MISC"],"url":"https://github.com/github/copilot-cli/releases/tag/v0.0.423"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:563692f8e552bd04ac5cad29b010a380d07e5c2b41dc270f9db31b6769f8f0e3 · sha256:f84f7b9603465a58… · /containers/cna/references/1

{"name":"https://github.com/github/copilot-cli/security/advisories/GHSA-g8r9-g2v8-jv6f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/github/copilot-cli/security/advisories/GHSA-g8r9-g2v8-jv6f"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:563692f8e552bd04ac5cad29b010a380d07e5c2b41dc270f9db31b6769f8f0e3 · sha256:f84f7b9603465a58… · /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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