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    4 vulnerabilities by oasdiff

    CVE-2026-53508 (GCVE-0-2026-53508)

    Vulnerability from nvd – Published: 2026-08-31 18:52 – Updated: 2026-08-31 18:58
    VLAI
    Title
    oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)
    Summary
    oasdiff is a command-line and Go package that compares and detects breaking changes in OpenAPI specs. From version 1.13.2 through version 1.18.0, oasdiff did not enforce --allow-external-refs=false (library: openapi3.Loader.IsExternalRefsAllowed = false) when loading a spec from a git revision (the rev:path form, e.g. main:openapi.yaml). External $refs were resolved on that load path even when external refs were explicitly disabled, so the mitigation silently did not apply there. This issue has been patched in version 1.18.1.
    Severity
    6 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-31 18:57 UTC
    CWE
    • CWE-73 - External Control of File Name or Path
    • CWE-693 - Protection Mechanism Failure
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    oasdiff oasdiff Affected: >= 1.13.2, < 1.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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                "id": "CVE-2026-53508",
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                  },
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                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-31T18:57:49.502659Z",
                "version": "2.0.3"
              },
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          "dateUpdated": "2026-08-31T18:58:08.849Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "product": "oasdiff",
          "vendor": "oasdiff",
          "versions": [
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      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "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:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
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        {
          "descriptions": [
            {
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              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
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          "url": "https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9"
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          "url": "https://github.com/oasdiff/oasdiff/pull/974"
        },
        {
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            "x_refsource_MISC"
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          "url": "https://github.com/oasdiff/oasdiff/pull/975"
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      "source": {
        "advisory": "GHSA-2jcc-mxv7-p3f9",
        "discovery": "UNKNOWN"
      },
      "title": "oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)"
    }
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    "state": "PUBLISHED"
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}

    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": [
            {
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              "version": "\u003c 0.0.51"
            }
          ]
        }
      ],
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        {
          "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"
          }
        }
      ],
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        {
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            {
              "cweId": "CWE-918",
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              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188: Insecure Default Initialization of Resource",
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              "type": "CWE"
            }
          ]
        }
      ],
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          ],
          "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",
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      ],
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        "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"
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    "assignerShortName": "GitHub_M",
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  "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",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "LOW"
          }
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      ],
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              "type": "CWE"
            }
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        {
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              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1188",
              "description": "CWE-1188: Insecure Default Initialization of Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
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        "dateUpdated": "2026-08-31T18:57:41.097Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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        {
          "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"
          ],
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        },
        {
          "name": "https://github.com/oasdiff/oasdiff-action/pull/129",
          "tags": [
            "x_refsource_MISC"
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        },
        {
          "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-2026-53508 (GCVE-0-2026-53508)

    Vulnerability from cvelistv5 – Published: 2026-08-31 18:52 – Updated: 2026-08-31 18:58
    VLAI
    Title
    oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)
    Summary
    oasdiff is a command-line and Go package that compares and detects breaking changes in OpenAPI specs. From version 1.13.2 through version 1.18.0, oasdiff did not enforce --allow-external-refs=false (library: openapi3.Loader.IsExternalRefsAllowed = false) when loading a spec from a git revision (the rev:path form, e.g. main:openapi.yaml). External $refs were resolved on that load path even when external refs were explicitly disabled, so the mitigation silently did not apply there. This issue has been patched in version 1.18.1.
    Severity
    6 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-31 18:57 UTC
    CWE
    • CWE-73 - External Control of File Name or Path
    • CWE-693 - Protection Mechanism Failure
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    oasdiff oasdiff Affected: >= 1.13.2, < 1.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-53508",
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                  },
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                  },
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                "timestamp": "2026-08-31T18:57:49.502659Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-08-31T18:58:08.849Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "oasdiff",
          "vendor": "oasdiff",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.13.2, \u003c 1.18.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "oasdiff is a command-line and Go package that compares and detects breaking changes in OpenAPI specs. From version 1.13.2 through version 1.18.0, oasdiff did not enforce --allow-external-refs=false (library: openapi3.Loader.IsExternalRefsAllowed = false) when loading a spec from a git revision (the rev:path form, e.g. main:openapi.yaml). External $refs were resolved on that load path even when external refs were explicitly disabled, so the mitigation silently did not apply there. This issue has been patched in version 1.18.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "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:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-73",
              "description": "CWE-73: External Control of File Name or Path",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T18:52:12.213Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff/pull/832",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff/pull/832"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff/pull/974",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff/pull/974"
        },
        {
          "name": "https://github.com/oasdiff/oasdiff/pull/975",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/oasdiff/oasdiff/pull/975"
        }
      ],
      "source": {
        "advisory": "GHSA-2jcc-mxv7-p3f9",
        "discovery": "UNKNOWN"
      },
      "title": "oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-53508",
    "datePublished": "2026-08-31T18:52:12.213Z",
    "dateReserved": "2026-06-09T17:05:25.059Z",
    "dateUpdated": "2026-08-31T18:58:08.849Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}