Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Kafka brokers are affected by a deserialization of untrusted data flaw through the SASL JAAS JndiLoginModule configuration, which can lead to remote code execution or denial of service. The packages kafka_2.12 and kafka_2.13 are affected before 3.4.0, and the other listed kafka_2.x packages have no fixed version listed. An attacker needs to be able to connect to the Kafka cluster and hold the AlterConfigs permission on the cluster resource. Upgrade kafka_2.12 and kafka_2.13 to 3.4.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.011, the 66th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:09 UTC First seen by agentprime
- 31 Oct 2026, 15:09 UTC Confirmed by OSV