Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
Medium, CVSS 6.9amended

Apache Avro Java SDK is Vulnerable to Code Injection

CVE-2025-33042GHSA-rp46-r563-jrc7

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (org.apache.avro:avro-compiler 1.12.1, 1.11.5; avro 1.11.5), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2025-33042: 0.67% estimated exploitation activity in the next 30 days; percentile 52.16 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-rp46-r563-jrc7

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record PYSEC-2026-26

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2025-33042

Advisory: Apache Avro Java SDK is Vulnerable to Code Injection
IDs: CVE-2025-33042, GHSA-rp46-r563-jrc7
Record: https://patchnext.com/advisories/cve-2025-33042 (revision 3, source checked 26 Oct 2026, 16:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.apache.avro:avro-compiler 1.12.1, 1.11.5; avro 1.11.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.avro:avro-compiler: affected >= 1.12.0, <= 1.12.0; < 1.11.5; fixed in 1.11.5, 1.12.1
- PyPI avro: affected < 1.11.5; fixed in 1.11.5

## Suggested inspection (read-only)
- Maven org.apache.avro:avro-compiler: check the installed version with your package manager.
- `python -m pip show avro`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.apache.avro:avro-compiler, avro.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/PYSEC-2026-26 (OSV record PYSEC-2026-26 lists affected ranges: PyPI avro >=0 <1.11.5 (fixed))
- Verified: https://github.com/advisories/GHSA-rp46-r563-jrc7 (GitHub-reviewed advisory GHSA-rp46-r563-jrc7 lists affected ranges: Maven org.apache.avro:avro-compiler >=1.12.0 =0 <1.11.5)

Commands are suggestions: review each one before running it.

Loading voting…