{"cve":"CVE-2026-53508","nvd":{"published":"2026-08-31T19:16:50.030","modified":"2026-09-09T21:09:13.080","status":"Deferred","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.","cvss_v4":{"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","score":6.0},"cvss_v3":null,"cwes":["CWE-73","CWE-693","CWE-918"],"references":["https://github.com/oasdiff/oasdiff/pull/832","https://github.com/oasdiff/oasdiff/pull/974","https://github.com/oasdiff/oasdiff/pull/975","https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-53508","score":0.005,"percentile":0.42874,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2jcc-mxv7-p3f9","url":"https://osv.dev/vulnerability/GHSA-2jcc-mxv7-p3f9","summary":"oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)","modified":"2026-07-21T19:19:21.916904551Z","packages":[{"ecosystem":"Go","name":"github.com/oasdiff/oasdiff","purl":"pkg:golang/github.com/oasdiff/oasdiff","ranges":[">=1.13.2 <1.18.1"],"fixed":["1.18.1"]}]},{"id":"GO-2026-5937","url":"https://osv.dev/vulnerability/GO-2026-5937","summary":"oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read) in github.com/oasdiff/oasdiff","modified":"2026-07-21T19:15:26.382846169Z","packages":[{"ecosystem":"Go","name":"github.com/oasdiff/oasdiff","purl":"pkg:golang/github.com/oasdiff/oasdiff","ranges":[">=1.13.2 <1.18.1"],"fixed":["1.18.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}