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TI-2026-74663 Aliases CVE-2026-100352GHSA-rj39-cv6w-8wv7

YAML NaN and Inf values cause panic in kin-openapi validation

Priority HIGH 72CWE-754Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
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.

Summary

kin-openapi before 0.148.0 passes YAML NaN and infinity numbers to its OpenAPI 3.1 validation path without its finite-number guards. An unauthenticated remote client can send such a YAML request body to an operation with a numeric constraint, causing a nil dereference and panic. Standard net/http servers recover the panic per connection, but other hosts may terminate the process. The root cause is a missing check for exceptional conditions (CWE-754).

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 0.148.0, the OpenAPI 3.1 validation path passes YAML NaN and infinity numeric values to santhosh-tekuri/jsonschema v6.0.2 without applying kin-openapi's existing finite-number guards. A remote unauthenticated client can send an application/yaml or application/x-yaml request body containing .nan, .inf, or -.inf to an operation with a numeric constraint, causing the dependency to create and dereference a nil big.Rat during ValidateRequest. Standard net/http servers recover the panic per connection, while other hosts or application goroutines may terminate the process. This issue is fixed in version 0.148.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00595 48th percentileScored 2026-11-07
Fix Partial kin-openapi (getkin): 0.148.0github.com/getkin/kin-openapi (Go): 0.148.0Red Hat: 5 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 0.148.00.148.0Patch availableCNA
—github.com/getkin/kin-openapi (Go)before 0.148.00.148.0Patch availableGHSA-rj39-cv6w-8wv7
  • kin-openapi Vendorgetkin Affected before 0.148.0 Fixed in 0.148.0 Patch available CNA
  • github.com/getkin/kin-openapi (Go) Vendor— Affected before 0.148.0 Fixed in 0.148.0 Patch available GHSA-rj39-cv6w-8wv7

Remediation

Upgrade the github.com/getkin/kin-openapi Go module to 0.148.0, which fixes the flaw. Red Hat Hardened Images are fixed by RHSA-2026:82637, RHSA-2026:85266, RHSA-2026:87077, RHSA-2026:90388 and RHSA-2026:91292. Red Hat lists Red Hat OpenShift AI (RHOAI) as affected with no fix available.

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

  • Fix · CNA kin-openapi (getkin) Fixed in 0.148.0
  • Fix · GHSA-rj39-cv6w-8wv7 github.com/getkin/kin-openapi (Go) Fixed in 0.148.0 Advisory →

Red Hat 5 advisories

  • RHSA-2026:91292 Released 2026-10-27 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images grafana12.4-12.4.13-0.5.hum1@aarch64, grafana12.4-12.4.13-0.5.hum1@src, grafana12.4-12.4.13-0.5.hum1@x86_64
  • RHSA-2026:90388 Released 2026-10-26 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images grafana12.4-12.4.13-0.4.hum1@aarch64, grafana12.4-12.4.13-0.4.hum1@src, grafana12.4-12.4.13-0.4.hum1@x86_64
  • 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
Show 2 more Red Hat advisories
  • 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

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-2026:82637, RHSA-2026:85266, RHSA-2026:87077, RHSA-2026:90388, RHSA-2026:91292
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-100352
  2. 2026-10-16 Alias added: GHSA-rj39-cv6w-8wv7
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-16 Fix available: RHSA-2026:82637 · 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 CISA SSVC decision points changed
  8. 2026-10-20 Priority changed: LOW → HIGH
  9. 2026-10-20 Fix available: RHSA-2026:85266 · Red Hat
  10. 2026-10-20 Affected versions changed · Red Hat
  11. 2026-10-22 Fix available: RHSA-2026:87077 · Red Hat
  12. 2026-10-22 Affected versions changed · Red Hat
  13. 2026-10-29 Affected versions changed · Red Hat
  14. 2026-10-30 Fix available: RHSA-2026:90388 · Red Hat
  15. 2026-10-30 Fix available: RHSA-2026:91292 · Red Hat
  16. 2026-10-30 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-2026-74661 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
  • TI-2026-53730 NULL pointer dereference in getkin kin-openapi 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