Vulnerability · Published Oct 30, 2026 · Assigned by redhat
CVE-2026-118952Kroxylicious-authorizer-acl: kroxylicious: acl prefix matching can bypass authorization rules
Medium 6.5
In plain English
A medium-severity incorrect authorization in streams for Apache Kafka 2 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 86.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | streams for Apache Kafka 2 | see references |
| Red Hat | streams for Apache Kafka 3 | see references |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-118952 vdb-entry, x_refsource_REDHAT
- RHBZ#2563276 issue-tracking, x_refsource_REDHAT
- https://github.com/kroxylicious/kroxylicious/security/advisories/GHSA-qvv3-6w3q-hgqc