EUVD-2026-81265
GHSA-8ghx-8455-hgv5
Severity by source
AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
AC:H because it requires first compromising an external action; PR:N since no privileges on Quay itself are needed; S:C as CI compromise spreads to registry/downstream images with full C/I/A impact.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
A flaw was found in quay-builder-qemu. A remote attacker could exploit this by compromising the upstream Noelware/docker-manifest-action used in the release workflow, which is pinned to a mutable branch. This allows the attacker to inject arbitrary code, leading to the exfiltration of sensitive registry credentials or the publication of malicious images. The workflow also exposes the default GitHub token, increasing the severity of the compromise.
Articles & Coverage 1
AnalysisAI
Code injection into the quay-builder-qemu release workflow through supply-chain compromise of the third-party GitHub Action Noelware/docker-manifest-action, which the workflow references by a mutable branch instead of a pinned immutable commit SHA. An attacker who first subverts that upstream action can execute arbitrary code inside the release pipeline, exfiltrating sensitive registry credentials or publishing malicious container images, with severity amplified because the workflow also exposes the default GITHUB_TOKEN. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the attacker first compromise the upstream third-party GitHub Action `Noelware/docker-manifest-action`, which the quay-builder-qemu release workflow references by a MUTABLE branch instead of a pinned immutable commit SHA - this mutable pin is the exact enabling misconfiguration. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a CI/CD supply-chain flaw (CWE-1357) in the release workflow of quay-builder-qemu, not a defect in deployed Quay instances. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch was identified at time of analysis, so the primary fix is configuration hardening of the workflow: replace the mutable branch reference to `Noelware/docker-manifest-action` with a pinned immutable commit SHA, which eliminates the ability of the upstream maintainer or an upstream attacker to swap in code without a reviewable workflow change; the trade-off is that the pin must be manually refreshed to receive upstream security fixes. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, treat the release pipeline as untrusted: freeze non-essential release workflow runs, audit recent quay-builder-qemu workflow executions and published image digests for unexplained changes, confirm no unexpected commits or tags were pushed, and rotate any long-lived registry credentials and tokens accessible to that workflow. …
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