High 8.2Published Oct 15, 2026

CVE-2026-100349kin-openapi openapi3filter: nil-pointer panic in ValidateResponse on a response header declared with content

Updated under an hour ago (2026-10-19 07:30 UTC)

Does this affect you?

It affects getkin kin-openapi. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.37%, higher than 29% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for getkin kin-openapi

Exploited in the last 30 days

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.146.0, openapi3filter.ValidateResponse passes a nil response header schema to decodeValue when an OpenAPI document declares the header with content instead of schema. The document passes validation, but every response validation for the affected operation dereferences the nil schema and panics even when the response does not contain the declared header. Applications that ingest an untrusted specification can expose this as remote availability impact, while applications using only trusted local specifications still crash when the affected operation is exercised. This issue is fixed in version 0.146.0.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.37% (percentile 29)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

getkin kin-openapi getkin:kin_openapi (from the name)	before 0.146.0	CNA record

References

https://github.com/getkin/kin-openapi/security/advisories/GHSA-74vm-87hj-r66fx-refsource-confirm
https://github.com/getkin/kin-openapi/commit/f5441d67f855ed34d975b3b85665764644ab1459x-refsource-misc
https://github.com/getkin/kin-openapi/releases/tag/v0.146.0x-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.