What is CVE-2026-118952?

CVE-2026-118952 is a medium-severity vulnerability in Red Hat Streams For Apache Kafka 3, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-10-30.

How severe is CVE-2026-118952?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Red Hat Streams For Apache Kafka 3

CVE-2026-118952

A flaw was found in the Kroxylicious ACL authorizer. Its prefix-matching logic may apply a rule to a principal of a different type, or fail to check a broader matching rule when prefixes overlap. Depending on the ACL configuration, this may allow an authenticated Kafka client to access a resource (such as read a topic) that should be denied.

Vulnerability class: Broken Access Control

Published 2026-10-30 · last modified 2026-10-30.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (14.0th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Red Hat Streams For Apache Kafka 3

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

access.redhat.com/security/cve/CVE-2026-118952 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
github.com/kroxylicious/kroxylicious/security/advisories/GHSA-qvv3-6w3q-hgqc

Frequently asked questions

What is CVE-2026-118952?: CVE-2026-118952 is a medium-severity vulnerability in Red Hat Streams For Apache Kafka 3, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-10-30.
How severe is CVE-2026-118952?: Medium severity. CVSS v3 base score is 6.5 out of 10.