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CVE-2026-100351VulnerabilityPublished Updated

Golang github getkin kin openapi: From 0.144.0 until 0.147.0, openapi3filter.ValidationHandler validates an operation

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

0
Authoritative record:CVE-2026-100351· High 7.4

Not known to be exploited · CVSS 7.4 High · fixed in 0.147.0 : patch golang-github-getkin-kin-openapi soon.

Data as of 28 Oct 2026, 22:30 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.147.0
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

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. From 0.144.0 until 0.147.0, openapi3filter.ValidationHandler validates an operation selected from decoded URL.Path while a downstream gorilla/mux router configured with UseEncodedPath can dispatch a different operation selected from URL.RawPath. When a public exact route and a protected parameterized route use the same method and overlap after decoding, an unauthenticated remote request containing an encoded path separator can be validated as public and then dispatched to the protected handler without invoking the configured AuthenticationFunc. The reachable path parameter is constrained to an encoded representation that decodes to the public literal route, and proxies that canonicalize the URI before forwarding prevent this specific mismatch. This issue is fixed in version 0.147.0.

References

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