CVE-2025-33042: Apache Avro Java SDK: Code injection on Java generated code

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-13 · updated 2026-06-17
Weakness: CWE-94

Description

Improper Control of Generation of Code ('Code Injection') vulnerability in Apache Avro Java SDK when generating specific records from untrusted Avro schemas. This issue affects Apache Avro Java SDK: all versions through 1.11.4 and version 1.12.0. Users are recommended to upgrade to version 1.12.1 or 1.11.5, which fix the issue.

Affected products

Apache Software Foundation Apache Avro: before 1.11.5; 1.12.0, 1.12.0-rc0, 1.12.0-rc1 — fixed in 1.11.5

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Avro 1.11.5. Check the vendor advisory for mitigations.

References

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