CVE-2026-53508oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)
Updated under an hour ago ()
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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
- 6.0 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-73, CWE-693, CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
oasdiff oasdiff oasdiff:oasdiff (from the name) | from 1.13.2, < 1.18.1 | CNA record |
References
- https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9x-refsource-confirm
- https://github.com/oasdiff/oasdiff/pull/832x-refsource-misc
- https://github.com/oasdiff/oasdiff/pull/974x-refsource-misc
- https://github.com/oasdiff/oasdiff/pull/975x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.