Read the docs
TI-2026-74803 Aliases CVE-2026-100349GHSA-74vm-87hj-r66f

Nil pointer panic in kin-openapi response header validation

Priority LOW 36CWE-476Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-476.

Summary

kin-openapi, a Go project for handling OpenAPI files, is affected before 0.146.0. When a response header is declared with content instead of schema, ValidateResponse passes a nil schema onward, which causes a NULL pointer dereference (CWE-476). Every response validation for the affected operation then panics, even when the response does not contain the header. Applications that ingest untrusted specifications can be crashed remotely, and applications using trusted local specifications still crash when that operation is exercised.

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 0.146.0, 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00472 41st percentileScored 2026-11-07
Fix Partial kin-openapi (getkin): 0.146.0github.com/getkin/kin-openapi (Go): 0.146.0Red Hat: 4 advisoriesRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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 0.146.00.146.0Patch availableCNA
—github.com/getkin/kin-openapi (Go)before 0.146.00.146.0Patch availableGHSA-74vm-87hj-r66f
  • kin-openapi Vendorgetkin Affected before 0.146.0 Fixed in 0.146.0 Patch available CNA
  • github.com/getkin/kin-openapi (Go) Vendor— Affected before 0.146.0 Fixed in 0.146.0 Patch available GHSA-74vm-87hj-r66f

Remediation

Update getkin kin-openapi to 0.146.0, and update the Go module github.com/getkin/kin-openapi to 0.146.0, which fixes all versions before it. Red Hat published Hardened Images fixes in RHSA-2026:76677, RHSA-2026:82637, RHSA-2026:85266 and RHSA-2026:87077. Red Hat lists no available fix plan for Red Hat OpenShift AI (RHOAI), which is affected.

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

  • Fix · CNA kin-openapi (getkin) Fixed in 0.146.0
  • Fix · GHSA-74vm-87hj-r66f github.com/getkin/kin-openapi (Go) Fixed in 0.146.0 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: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
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-2026-100349
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  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. 2026-10-16 CISA SSVC decision points changed
  8. 2026-10-18 Alias added: GHSA-74vm-87hj-r66f
  9. 2026-10-18 Fix available: Go/github.com/getkin/[email protected] · GHSA-74vm-87hj-r66f
  10. 2026-10-18 CVSS score added · GHSA-74vm-87hj-r66f
  11. 2026-10-18 Weakness changed · GHSA-74vm-87hj-r66f
  12. 2026-10-18 5 new references · GHSA-74vm-87hj-r66f
  13. 2026-10-20 Fix available: RHSA-2026:85266 · Red Hat
  14. 2026-10-20 Affected versions changed · Red Hat
  15. 2026-10-22 Fix available: RHSA-2026:87077 · Red Hat
  16. 2026-10-22 Affected versions changed · Red Hat
  17. 2026-11-06 Affected versions changed · Red Hat
  18. 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