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Fencer Intel
high 7.5

CVE-2026-100352 json

kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation Path

published 25d ago modified 4d ago also GHSA-rj39-cv6w-8wv7 , GO-2026-6795 , EUVD-2026-102161

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 48%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/getkin/kin-openapi 0.148.0
  • 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
  • hugo openSUSE Tumbleweed 0.168.0-2.1

opensuse advisories openSUSE-SU-2026:12309-1openSUSE-SU-2026:12164-1

Is CVE-2026-100352 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2026-100352 updated cvss 7.5

github.com/getkin/kin-openapi: kin-openapi: Denial of Service via improper handling of non-finite numeric values

  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-eval-hub-rhel9, rhoai/odh-mod-arch-agent-ops-rhel9
    affected: no fix available
  • 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
    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
20d ago

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/getkin/kin-openapi/security/advisories/GHSA-rj39-cv6w-8wv7 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
<0.148.0
0.148.0

Affected products

  • getkin kin-openapi

Classification

Weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions

References

Sources

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