---
title: "kin-openapi - Denial of Service"
description: "kin-openapi < 0.146.0 contains a denial of service caused by passing a nil response header schema to decodeValue in openapi3filter.ValidateResponse, letting remote attackers or local users cause application crashes, exploit requires triggering the affected operation."
url: https://panop.io/threat-heartbeat/CVE-2026-100349/
---

# CVE-2026-100349 kin-openapi - Denial of Service

kin-openapi < 0.146.0 contains a denial of service caused by passing a nil response header schema to decodeValue in openapi3filter.ValidateResponse, letting remote attackers or local users cause application crashes, exploit requires triggering the affected operation.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100349)

## Details

Type

Denial Of Service

Impact

Denial Of Service

CVSS vector

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/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

Published

15 October 2026

Updated

16 October 2026

Weakness

[CWE-476](https://cwe.mitre.org/data/definitions/476.html)

## Vendor fix

Upgrade to version 0.146.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100349](https://nvd.nist.gov/vuln/detail/CVE-2026-100349)
- [https://github.com/getkin/kin-openapi/commit/f5441d67f855ed34d975b3b85665764644ab1459](https://github.com/getkin/kin-openapi/commit/f5441d67f855ed34d975b3b85665764644ab1459)
- [https://github.com/getkin/kin-openapi/releases/tag/v0.146.0](https://github.com/getkin/kin-openapi/releases/tag/v0.146.0)
- [https://github.com/getkin/kin-openapi/security/advisories/GHSA-74vm-87hj-r66f](https://github.com/getkin/kin-openapi/security/advisories/GHSA-74vm-87hj-r66f)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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