{"id":"CVE-2026-53508","state":"PUBLISHED","title":"oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)","description":"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.","publishedAt":"2026-08-31T18:52:12.213Z","updatedAt":"2026-08-31T18:58:08.849Z","severity":{"score":6,"label":"Medium","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["oasdiff oasdiff"],"affected":[{"vendor":"oasdiff","product":"oasdiff","versions":[{"version":">= 1.13.2, < 1.18.1","status":"affected"}]}],"references":["https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9","https://github.com/oasdiff/oasdiff/pull/832","https://github.com/oasdiff/oasdiff/pull/974","https://github.com/oasdiff/oasdiff/pull/975"],"weaknesses":["CWE-73","CWE-693","CWE-918"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53508.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53508","state":"PUBLISHED","datePublished":"2026-08-31T18:52:12.213Z","dateUpdated":"2026-08-31T18:58:08.849Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-09T17:05:25.059Z"},"containers":{"cna":{"title":"oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)","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."}],"affected":[{"vendor":"oasdiff","product":"oasdiff","versions":[{"version":">= 1.13.2, < 1.18.1","status":"affected"}]}],"references":[{"url":"https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9","name":"https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/oasdiff/oasdiff/pull/832","name":"https://github.com/oasdiff/oasdiff/pull/832","tags":["x_refsource_MISC"]},{"url":"https://github.com/oasdiff/oasdiff/pull/974","name":"https://github.com/oasdiff/oasdiff/pull/974","tags":["x_refsource_MISC"]},{"url":"https://github.com/oasdiff/oasdiff/pull/975","name":"https://github.com/oasdiff/oasdiff/pull/975","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6,"baseSeverity":"MEDIUM","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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-73","lang":"en","description":"CWE-73: External Control of File Name or Path","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-693","lang":"en","description":"CWE-693: Protection Mechanism Failure","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-31T18:52:12.213Z"},"source":{"advisory":"GHSA-2jcc-mxv7-p3f9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T18:57:49.502659Z","id":"CVE-2026-53508","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-31T18:58:08.849Z"}}]}}}