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    2 vulnerabilities found for oasdiff-action by oasdiff

    CVE-2026-53507 (GCVE-0-2026-53507)

    Vulnerability from nvd – Published: 2026-08-31 18:57 – Updated: 2026-08-31 18:57
    VLAI
    Title
    oasdiff actions resolve external $refs by default, enabling SSRF and disclosure of structured files on pull-request runs
    Summary
    oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0.51, the oasdiff actions resolved external $refs in the OpenAPI spec by default (allow-external-refs: true). When an action runs on a pull request whose spec is attacker-controlled — most importantly fork pull requests on public repositories — a $ref in that spec is fetched/read on the runner with no interaction required, enabling SSRF and disclosure of structured files on the runner. This issue has been patched in version 0.0.51.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    • CWE-918 - Server-Side Request Forgery (SSRF)
    • CWE-1188 - Insecure Default Initialization of Resource
    Assigner
    References
    Impacted products
    Vendor Product Version
    oasdiff oasdiff-action Affected: < 0.0.51
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "oasdiff-action",
          "vendor": "oasdiff",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.0.51"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0.51, the oasdiff actions resolved external $refs in the OpenAPI spec by default (allow-external-refs: true). When an action runs on a pull request whose spec is attacker-controlled \u2014 most importantly fork pull requests on public repositories \u2014 a $ref in that spec is fetched/read on the runner with no interaction required, enabling SSRF and disclosure of structured files on the runner. This issue has been patched in version 0.0.51."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188: Insecure Default Initialization of Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T18:57:41.097Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/oasdiff/oasdiff-action/security/advisories/GHSA-fhj3-7267-7vv5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/security/advisories/GHSA-fhj3-7267-7vv5"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/128",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/pull/128"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/129",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/pull/129"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/130",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/pull/130"
        }
      ],
      "source": {
        "advisory": "GHSA-fhj3-7267-7vv5",
        "discovery": "UNKNOWN"
      },
      "title": "oasdiff actions resolve external $refs by default, enabling SSRF and disclosure of structured files on pull-request runs"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-53507",
    "datePublished": "2026-08-31T18:57:41.097Z",
    "dateReserved": "2026-06-09T17:05:25.059Z",
    "dateUpdated": "2026-08-31T18:57:41.097Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-53507 (GCVE-0-2026-53507)

    Vulnerability from cvelistv5 – Published: 2026-08-31 18:57 – Updated: 2026-08-31 18:57
    VLAI
    Title
    oasdiff actions resolve external $refs by default, enabling SSRF and disclosure of structured files on pull-request runs
    Summary
    oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0.51, the oasdiff actions resolved external $refs in the OpenAPI spec by default (allow-external-refs: true). When an action runs on a pull request whose spec is attacker-controlled — most importantly fork pull requests on public repositories — a $ref in that spec is fetched/read on the runner with no interaction required, enabling SSRF and disclosure of structured files on the runner. This issue has been patched in version 0.0.51.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    • CWE-918 - Server-Side Request Forgery (SSRF)
    • CWE-1188 - Insecure Default Initialization of Resource
    Assigner
    References
    Impacted products
    Vendor Product Version
    oasdiff oasdiff-action Affected: < 0.0.51
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "oasdiff-action",
          "vendor": "oasdiff",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.0.51"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0.51, the oasdiff actions resolved external $refs in the OpenAPI spec by default (allow-external-refs: true). When an action runs on a pull request whose spec is attacker-controlled \u2014 most importantly fork pull requests on public repositories \u2014 a $ref in that spec is fetched/read on the runner with no interaction required, enabling SSRF and disclosure of structured files on the runner. This issue has been patched in version 0.0.51."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188: Insecure Default Initialization of Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T18:57:41.097Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/oasdiff/oasdiff-action/security/advisories/GHSA-fhj3-7267-7vv5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/security/advisories/GHSA-fhj3-7267-7vv5"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/128",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/pull/128"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/129",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/pull/129"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/130",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff-action/pull/130"
        }
      ],
      "source": {
        "advisory": "GHSA-fhj3-7267-7vv5",
        "discovery": "UNKNOWN"
      },
      "title": "oasdiff actions resolve external $refs by default, enabling SSRF and disclosure of structured files on pull-request runs"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-53507",
    "datePublished": "2026-08-31T18:57:41.097Z",
    "dateReserved": "2026-06-09T17:05:25.059Z",
    "dateUpdated": "2026-08-31T18:57:41.097Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}