oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)
Published Aug 31, 2026
6.0
MEDIUMCVSS 4.0
EPSS 0.50%
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.
Affected products
-
- Version >= 1.13.2, < 1.18.1StatusaffectedConstraints-
- Version
No data.
No data.
No Red Hat product state for this CVE.
github.com/oasdiff/oasdiff
Go
Introduced 1.13.2 Fixed 1.18.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/oasdiff/oasdiff | 1.13.2 | 1.18.1 |
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 31, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.50% (0.00500) | 40.70th | v5 (v2026.06.15) |
| Sep 1, 2026 | 0.29% (0.00288) | 20.89th | v5 (v2026.06.15) |
References (5)
- https://github.com/advisories/GHSA-2jcc-mxv7-p3f9 Advisory
- https://github.com/oasdiff/oasdiff/pull/832 x_refsource_MISC
- https://github.com/oasdiff/oasdiff/pull/974 x_refsource_MISC
- https://github.com/oasdiff/oasdiff/pull/975 x_refsource_MISC
- https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-2jcc-mxv7-p3f9 | Advisory | |
| https://github.com/oasdiff/oasdiff/pull/832 | x_refsource_MISC | |
| https://github.com/oasdiff/oasdiff/pull/974 | x_refsource_MISC | |
| https://github.com/oasdiff/oasdiff/pull/975 | x_refsource_MISC | |
| https://github.com/oasdiff/oasdiff/security/advisories/GHSA-2jcc-mxv7-p3f9 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.