CVE Catalog

CVE-2026-53508

MediumCVSS 6.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.29%

21th percentile - higher than 21% of all known CVEs

Summary

oasdiff is a command-line and Go package that compares and detects breaking changes in OpenAPI specs. From version 1.13.2 through 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.

Risk Assessment

This could lead to unexpected fetching of external resources during spec processing, potentially exposing the organization to SSRF attacks or unauthorized access to external data. The issue has been patched in version 1.18.1.

Recommendation

Upgrade oasdiff to version 1.18.1 or later to ensure external refs are properly disabled.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS