CVE-2026-100350
mediumkin-openapi is a Go project for handling OpenAPI files.
kin-openapi is a Go project for handling OpenAPI files. From 0.145.0 until 0.146.0, openapi3filter repeatedly calls regexp.MustCompile for the same parameter-name regular expression inside the per-query-key loop in urlValuesDecoder.DecodeObject used to decode a deepObject query parameter. An unauthenticated remote client can send an affected endpoint a request containing many unrelated query keys, causing ValidateRequest to perform work and allocations proportional to the attacker-controlled key count for every deepObject parameter. The expression itself is fixed and this is not regular expression denial of service; the resource consumption comes from loop-invariant recompilation. This issue is fixed in version 0.146.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/getkin/kin-openapi/commit/d090e36b2f1c42c898ba2a687a8f6e25f5ca727f security-advisories@github.com
- https://github.com/getkin/kin-openapi/releases/tag/v0.146.0 security-advisories@github.com
- https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc security-advisories@github.com
- https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc 134c704f-9b21-4f2e-91b3-4a467353bcc0