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TI-2026-74655 Aliases CVE-2026-100347GHSA-fh4f-47mf-f2gj

Panic in kin-openapi legacy router from unsupported HTTP method

Priority MEDIUM 63CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-248.

Summary

kin-openapi versions before 0.145.0 are affected. The legacy router used by openapi3filter.ValidationHandler passes unsupported or non-canonical HTTP methods for exact static paths into a default branch that panics, an uncaught exception (CWE-248). An unauthenticated remote client can repeatedly send such requests to abort connections and grow logs with stack traces.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3filter.ValidationHandler uses the routers/legacy router, which passes an unsupported or non-canonical HTTP method for an existing static path to openapi3.PathItem.GetOperation. The default branch of GetOperation panics before authentication runs, so an unauthenticated remote client can repeatedly send methods such as PROPFIND or lowercase get to abort connections and generate stack-trace log growth. The specific panic requires an exact static path; a concrete path matched only by a templated route does not reach the same sink. This issue is fixed in version 0.145.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00515 44th percentileScored 2026-11-07
Fix Partial kin-openapi (getkin): 0.145.0github.com/getkin/kin-openapi (Go): 0.145.0Red Hat: 4 advisoriesRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
getkinkin-openapibefore 0.145.00.145.0Patch availableCNA
—github.com/getkin/kin-openapi (Go)before 0.145.00.145.0Patch availableGHSA-fh4f-47mf-f2gj
  • kin-openapi Vendorgetkin Affected before 0.145.0 Fixed in 0.145.0 Patch available CNA
  • github.com/getkin/kin-openapi (Go) Vendor— Affected before 0.145.0 Fixed in 0.145.0 Patch available GHSA-fh4f-47mf-f2gj

Remediation

Update kin-openapi to version 0.145.0, which fixes the Go module github.com/getkin/kin-openapi. Red Hat fixes Red Hat Hardened Images in RHSA-2026:76677, RHSA-2026:82637, RHSA-2026:85266 and RHSA-2026:87077. Red Hat lists Red Hat OpenShift AI (RHOAI) as affected with no available fix plan.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA kin-openapi (getkin) Fixed in 0.145.0
  • Fix · GHSA-fh4f-47mf-f2gj github.com/getkin/kin-openapi (Go) Fixed in 0.145.0 Advisory →

Red Hat 4 advisories

  • RHSA-2026:87077 Released 2026-10-21 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images grafana13.1-13.1.8-0.3.hum1@aarch64, grafana13.1-13.1.8-0.3.hum1@s390x, grafana13.1-13.1.8-0.3.hum1@src +1
  • RHSA-2026:85266 Released 2026-10-19 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images grafana13.2-13.2.3-0.3.hum1@aarch64, grafana13.2-13.2.3-0.3.hum1@s390x, grafana13.2-13.2.3-0.3.hum1@src +1
  • RHSA-2026:82637 Released 2026-10-14 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images hugo-0.168.0-0.1.hum1@aarch64, hugo-0.168.0-0.1.hum1@s390x, hugo-0.168.0-0.1.hum1@src +1
Show 1 more Red Hat advisories
  • RHSA-2026:76677 Released 2026-10-06 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images grafana12.4-12.4.12-0.4.hum1@aarch64, grafana12.4-12.4.12-0.4.hum1@src, grafana12.4-12.4.12-0.4.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:76677, RHSA-2026:82637, RHSA-2026:85266, RHSA-2026:87077
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-100347
  2. 2026-10-16 Alias added: GHSA-fh4f-47mf-f2gj
  3. 2026-10-16 Fix available: RHSA-2026:82637 · Red Hat
  4. 2026-10-16 Fix available: RHSA-2026:76677 · Red Hat
  5. 2026-10-16 Fix available: Red Hat Hardened Images · Red Hat
  6. 2026-10-16 CVSS score added · Red Hat
  7. 2026-10-20 Fix available: RHSA-2026:85266 · Red Hat
  8. 2026-10-20 Affected versions changed · Red Hat
  9. 2026-10-22 Fix available: RHSA-2026:87077 · Red Hat
  10. 2026-10-22 Affected versions changed · Red Hat
  11. 2026-11-06 Affected versions changed · Red Hat

References

Advisory 1

Other 4

  • TI-2026-51613 kin-openapi: ValidationHandler.Load() Fail-Open Authentication Bypass via NoopAuthenticationFunc Default CVSS 3.1CRITICAL 9.1
  • TI-2026-53976 kin-openapi: Uncontrolled resource consumption in openapi3filter deepObject query parameter decoding CVSS 4.0HIGH 8.7
  • TI-2026-74664 Nil pointer panic in kin-openapi openapi3filter decoding CVSS 3.1HIGH 7.5
  • TI-2026-74663 YAML NaN and Inf values cause panic in kin-openapi validation CVSS 3.1HIGH 7.5
  • TI-2026-74661 kin-openapi nil pointer panic in openapi3filter on array schemas without items CVSS 3.1HIGH 7.5
  • TI-2026-74657 Uncontrolled recursion in kin-openapi crashes the process CVSS 3.1HIGH 7.5
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences