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CVE-2026-100354VulnerabilityPublished Updated

Golang github getkin kin openapi: Prior to 0.149.0, runtime request, response, and direct schema validation lacks

Affects golang-github-getkin-kin-openapiSource GCVE Database

0
Authoritative record:CVE-2026-100354· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in 0.149.0 : patch golang-github-getkin-kin-openapi soon.

Data as of 28 Oct 2026, 22:30 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.149.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10golang-github-getkin-kin-openapipkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=stonkingOther threatsAffected
  • =0.124.0-1
  • =0.135.0-1
Fixed in–
Ubuntu 26.04 LTSgolang-github-getkin-kin-openapipkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=resoluteOther threatsAffected
  • =0.124.0-1
Fixed in–
Ubuntu 24.04 LTSgolang-github-getkin-kin-openapipkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=nobleOther threatsAffected
  • 0.117.0-1 – 0.123.0-1
4 affected builds
Fixed in–
Ubuntu 22.04 LTSgolang-github-getkin-kin-openapipkg:deb/ubuntu/golang-github-getkin-kin-openapi?arch=source&distro=jammyOther threatsAffected
  • =0.32.0-2
  • =0.80.0-1
  • =0.85.0-1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.149.0, runtime request, response, and direct schema validation lacks cycle detection when an allOf, anyOf, or oneOf chain refers back to an ancestor schema, even though loading and document validation accept the circular reference. A request or response that reaches the affected schema causes unbounded recursion in Schema.visitJSON or openapi3filter.decodeValue and exhausts the Go goroutine stack. The resulting fatal stack overflow cannot be caught with recover and terminates the entire process, including unrelated requests. This issue is fixed in version 0.149.0.

References

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