Vulnerability 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.
Related Weaknesses (CWE)
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
FAQ
What is CVE-2026-53508?
CVE-2026-53508 is a documented vulnerability. 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 (l...
How severe is CVE-2026-53508?
CVSS scoring is not yet available for CVE-2026-53508. Check NVD for updates.
Is there a patch for CVE-2026-53508?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.