CVE-2026-53508 (GCVE-0-2026-53508)

Vulnerability from cvelistv5 – Published: 2026-08-31 18:52 – Updated: 2026-08-31 18:58
VLAI
Title
oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)
Summary
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.
Severity
6 (Medium)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:57 UTC
CWE
  • CWE-73 - External Control of File Name or Path
  • CWE-693 - Protection Mechanism Failure
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7771 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
oasdiff oasdiff Affected: >= 1.13.2, < 1.18.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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