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Fencer Vulns
high 7.5

CVE-2026-97394 json

kin-openapi: Nil-pointer dereference panic in openapi3filter for OpenAPI 3.1 array schemas missing items

published 2026-10-15 24 d ago modified 2026-11-05 3 d ago also GHSA-p6wj-qrr4-pgh5 , GO-2026-6790 , EUVD-2026-102143

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.143.0, openapi3filter accepts OpenAPI 3.1 array schemas without an items keyword and then dereferences the nil Schema.Items value while decoding application/x-www-form-urlencoded or multipart/form-data request bodies, response headers, and other array parameter surfaces. A remote unauthenticated client can reach an affected operation with a nonempty request or matching response and deterministically trigger a nil-pointer panic during ValidateRequest or ValidateResponse. OpenAPI 3.0 documents are not affected because document validation rejects arrays without items, and JSON request bodies use a different decoder path. This issue is fixed in version 0.143.0.

Patch / fix

  • go github.com/getkin/kin-openapi 0.143.0
  • hugo hummingbird 1 0.168.0-0.1.hum1
  • grafana12.4 hummingbird 1 12.4.12-0.4.hum1
  • grafana13.1 hummingbird 1 13.1.7-0.1.hum1
  • grafana13.2 hummingbird 1 13.2.3-0.1.hum1

red hat advisories RHSA-2026:82637RHSA-2026:76677RHSA-2026:76448RHSA-2026:76430

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-2026-97394 updated cvss 7.5

github.com/getkin/kin-openapi: kin-openapi: Denial of Service via nil-pointer dereference in openapi3filter

  • Red Hat Hardened Images hugo 0.168.0-0.1.hum1, grafana13.1 13.1.7-0.1.hum1, grafana13.2 13.2.3-0.1.hum1, grafana12.4 12.4.12-0.4.hum1
    fixed: vendor fix RHSA-2026:76677
  • 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
20 d ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/opnsense/core/security/advisories/GHSA-26cj-h9rj-g5pf 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, <0.143.0
0.143.0

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.