HIGHMaven →
Apache Kafka does not validate JWT tokens in its OAUTHBEARER authentication implementation
Apache Kafka does not validate JWT tokens in its OAUTHBEARER authentication implementation
Affected packages
- org.apache.kafka:kafka-clients— 4.1.0 → 4.1.2
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://nvd.nist.gov/vuln/detail/CVE-2026-33557
- https://github.com/apache/kafka/commit/01d8e7db8d08dbd538892b409457ea6bfcc2a422
- https://github.com/apache/kafka
- https://kafka.apache.org/cve-list
- https://lists.apache.org/thread/v57o00hm6yszdpdnvqx2ss4561yh953h
- http://www.openwall.com/lists/oss-security/2026/04/17/2
Structured record: https://osv.dev/vulnerability/GHSA-28jg-cgg7-j4wc
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