CVE-2026-66874 (GCVE-0-2026-66874)

Vulnerability from cvelistv5 – Published: 2026-10-14 14:36 – Updated: 2026-10-14 15:12
VLAI
Title
Gitea required Actions check bypass through skipped workflows
Summary
For pull request events, Gitea reads workflow definitions from the pull request head and posts a synthetic skipped status when workflow branch or path filters exclude execution. A fork pull request author can supply a workflow matching a required status context but deliberately prevent it from running. Because skipped statuses count as success, branch protection or organization-required workflow checks can appear satisfied without the mandated workflow executing; no runner or maintainer approval is required for this path.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 15:12 UTC
CWE
  • CWE-284 - Improper Access Control
  • CWE-345 - Insufficient Verification of Data Authenticity
  • CWE-693 - Protection Mechanism Failure
  • CWE-807 - Reliance on Untrusted Inputs in a Security Decision
Assigner
Gitea CNA under the mitre root
CNA scorecard C 61/100 over 153 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
Gitea Gitea Affected: 0 , ≤ 1.27.2 (semver)
guessed Create a notification for this product.
Show details on NVD website

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              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
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              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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                "version": "2.0.3"
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        "title": "CISA ADP Vulnrichment"
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          "value": "For pull request events, Gitea reads workflow definitions from the pull request head and posts a synthetic skipped status when workflow branch or path filters exclude execution. A fork pull request author can supply a workflow matching a required status context but deliberately prevent it from running. Because skipped statuses count as success, branch protection or organization-required workflow checks can appear satisfied without the mandated workflow executing; no runner or maintainer approval is required for this path."
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      ],
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            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
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            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
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            {
              "cweId": "CWE-807",
              "description": "CWE-807: Reliance on Untrusted Inputs in a Security Decision",
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          "name": "GitHub Security Advisory GHSA-5xp7-r6cr-39ff",
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          "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-5xp7-r6cr-39ff"
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          "name": "Gitea 1.27.3 release announcement",
          "tags": [
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          "url": "https://blog.gitea.com/release-of-1.27.3/"
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        {
          "name": "Fix: go-gitea/gitea pull request #39005",
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          "url": "https://github.com/go-gitea/gitea/pull/39005"
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        {
          "name": "Fix: go-gitea/gitea pull request #39018",
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          "url": "https://github.com/go-gitea/gitea/pull/39018"
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          "name": "go-gitea/gitea v1.27.3 release",
          "tags": [
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          "url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3"
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    "dateReserved": "2026-08-13T16:50:58.692Z",
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                "versions": [
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                    "lessThanOrEqual": "1.27.2",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
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        "descriptions": [
          {
            "lang": "en",
            "value": "For pull request events, Gitea reads workflow definitions from the pull request head and posts a synthetic skipped status when workflow branch or path filters exclude execution. A fork pull request author can supply a workflow matching a required status context but deliberately prevent it from running. Because skipped statuses count as success, branch protection or organization-required workflow checks can appear satisfied without the mandated workflow executing; no runner or maintainer approval is required for this path."
          }
        ],
        "id": "CVE-2026-66874",
        "lastModified": "2026-10-14T16:17:50.407",
        "metrics": {
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                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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        "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "vulnStatus": "Deferred",
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                "value": "CWE-807"
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    },
    "vulnrichment": {
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}



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