PatchTheCVECVE-2026-111551: Several Kafka deserialization paths read a size or count field from input data and use it directly to allocate
CVE-2026-111551 is a high-severity flaw (CVSS n/a) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Several Kafka deserialization paths read a size or count field from input data and use it directly to allocate an array, collection, or byte buffer, with no check against the bytes actually available. A small crafted input can therefore declare a very large size and force a multi-gigabyte allocation. The affected paths are, in Kafka Streams, ProcessorRecordContext (header count), ChangedDeserializer (varint value length), CombinedKeySchema (forei
Why this priority
- On your watchlist
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-10-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- oss-security list: CVE-2026-111551: Apache Kafka: Denial of service in Kafka Streams and client deserializers via unbounded memory allocation 2026-10-28
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-111551?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-111551 being exploited?
CVE-2026-111551 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-111551 affect?
CVE-2026-111551 affects affected software. Severity is high (CVSS n/a). Several Kafka deserialization paths read a size or count field from input data and use it directly to allocate an array, collection, or byte buffer, with no check against the bytes actually available. A small crafted input can therefore dec
How urgent is CVE-2026-111551?
Priority 5/100. On your watchlist