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CVE-2026-34041

act is a project which allows for local running of github actions. Prior to version 0.2.86, act unconditionally processes the deprecated ::set-env:: and ::add-path:: workflow commands, which was disabled due to environment injection risks. When a workflow step echoes untrusted data to stdout, an attacker can inject these commands to set arbitrary environment variables or modify the PATH for all subsequent steps in the job. This issue has been patched in version 0.2.86.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e7eb528bb4ceddced6ce94857ba6e5ff9b22e77874c359f6196198dd282f039e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/adp/0/metrics/0/cvssV3_1

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"product":"act","vendor":"nektos","versions":[{"status":"affected","version":"< 0.2.86"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/adp/0/metrics/0/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-74","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/nektos/act/commit/0c739c8e39c41aa5a07665f732da9cab6df0097a","tags":["x_refsource_MISC"],"url":"https://github.com/nektos/act/commit/0c739c8e39c41aa5a07665f732da9cab6df0097a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/cna/references/1
{"name":"https://github.com/nektos/act/releases/tag/v0.2.86","tags":["x_refsource_MISC"],"url":"https://github.com/nektos/act/releases/tag/v0.2.86"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /containers/cna/references/2
{"name":"https://github.com/nektos/act/security/advisories/GHSA-xmgr-9pqc-h5vw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nektos/act/security/advisories/GHSA-xmgr-9pqc-h5vw"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1bcaf012f21c50213231f030d8a39760b4eebb36e4839151bd1816da4a8d08c0 · sha256:32940aa682ac67eb… · /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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