NULL pointer dereference in Getkin Kin-Openapi
CVE-2026-76905
kin-openapi is a Go project for handling OpenAPI files. From 0.10.0 until 0.141.0, openapi3filter.convertParseError in openapi3filter/validation_error_encoder.go dereferences e.Parameter.In without checking whether e.Parameter is nil. A malformed non-string scalar field in a multipart/form-data request body produces a nested ParseError with a nil RequestError.Parameter, and applications that render the validation error through openapi3filter.ConvertErrors or ValidationErrorEncoder panic. An unauthenticated client can repeatedly send such requests to deny service when the application lacks a recovery boundary. JSON request bodies and applications that do not use these error-rendering helpers are not affected. This issue is fixed in version 0.141.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.003
Affected products
- Getkin Kin-Openapi — versions >= 0.10.0, < 0.141.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-76905?
- CVE-2026-76905 is a high-severity vulnerability in Getkin Kin-Openapi, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-08-21.
- How severe is CVE-2026-76905?
- High severity. CVSS v3 base score is 7.5 out of 10.