CVE Explorer

CVE-2026-32947

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, a DNS over HTTPS (DoH) vulnerability allows attackers to bypass egress-policy: block network restrictions by tunneling exfiltrated data through permitted HTTPS endpoints like dns.google. The attack works by encoding sensitive data (e.g., the runner's hostname) as subdomains in DoH queries, which appear as legitimate HTTPS traffic to Harden-Runner's domain-based filtering but a

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ea9d6bb01a4e3fa3cb2d7368b67ddce438593d0226294cca185392b70b04754f

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-693","description":"CWE-693: Protection Mechanism Failure","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"harden-runner","vendor":"step-security","versions":[{"status":"affected","version":"< 2.16"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":4.6,"baseSeverity":"MEDIUM","privilegesRequired":"HIGH","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/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:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-693","description":"CWE-693: Protection Mechanism Failure","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/step-security/harden-runner/releases/tag/v2.16.0","tags":["x_refsource_MISC"],"url":"https://github.com/step-security/harden-runner/releases/tag/v2.16.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /containers/cna/references/1

{"name":"https://github.com/step-security/harden-runner/security/advisories/GHSA-46g3-37rh-v698","tags":["x_refsource_CONFIRM"],"url":"https://github.com/step-security/harden-runner/security/advisories/GHSA-46g3-37rh-v698"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b41d54917278701c5e449bebe1c735708b63e2498728964fe3c9b1b62c76fcf2 · sha256:34c1110d8a67ee7e… · /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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