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Fencer Vulns
high 7.5

CVE-2026-100353 json

kin-openapi: Incomplete Fix for GHSA-p6wj-qrr4-pgh5: Three Unpatched nil-Items Panic Paths in openapi3filter

published 2026-10-15 24 d ago modified 2026-11-05 3 d ago also GHSA-vrcc-3ch7-hppw , GO-2026-6800 , EUVD-2026-102163

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic nil-pointer panic through an array query parameter, a deepObject query parameter containing an array property, or an application/x-www-form-urlencoded request body whose array property appears inside an allOf, anyOf, or oneOf subschema. The query and composed-body paths reach urlValuesDecoder.parseArray, while the deepObject path reaches buildResObj, and all pass a nil items schema into code that dereferences it. This issue is fixed in version 0.149.0.

Patch / fix

  • go github.com/getkin/kin-openapi 0.149.0
  • grafana13.2 hummingbird 1 13.2.3-0.3.hum1
  • hugo hummingbird 1 0.168.0-0.1.hum1

red hat advisories RHSA-2026:85266RHSA-2026:82637

  • timoni openSUSE Tumbleweed 0.36.0-1.1

opensuse advisories openSUSE-SU-2026:12309-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-100353 updated cvss 7.5

github.com/getkin/kin-openapi: kin-openapi: Denial of Service via nil-pointer dereference in request decoding

  • Red Hat Hardened Images hugo 0.168.0-0.1.hum1, grafana13.1 13.1.8-0.3.hum1, grafana13.2 13.2.3-0.3.hum1, grafana12.4 12.4.13-0.4.hum1, grafana12.4 12.4.13-0.5.hum1
    fixed: vendor fix RHSA-2026:90388
  • Red Hat Hardened Images go-fdo-server 1.0.2-1.1.hum1 Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
10 d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/getkin/kin-openapi/security/advisories/GHSA-vrcc-3ch7-hppw referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/getkin/kin-openapi
>=0.136.0, <0.149.0
0.149.0

Affected products

  • getkin kin-openapi

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.