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Advisory severityUnratedApache Software Foundation Updated

Advisory [CVE-2026-90436] ** UNSUPPORTED WHEN ASSIGNED ** Deserialization of an inbound SOAP fault in Apache Axis 1.x allows unauthenticated remote class instantiation

This Apache Software Foundation security advisory covers CVE-2026-90436 affecting Apache Axis.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-90436 Source published Source updated

VulniPulse record published Record updated

CVE-2026-90436
Affected products & platforms
Apache Software FoundationUnclassified
Open source advisory

Summary

  • * UNSUPPORTED WHEN ASSIGNED ** Deserialization of an inbound SOAP fault in Apache Axis 1.x allows unauthenticated remote class instantiation. When a SOAP carries a element, Axis loads the named class and, if a String element is also present, instantiates it through its String constructor before checking that it is an AxisFault. Loading alone runs the class's static initializer. With a suitable class on the application's classpath this leads to remote code execution. The fault is parsed while the engine resolves the target service, before any per-service handler chain runs, so authentication handlers configured on a service do not protect against it. This affects all Apache Axis 1.x versions through 1.4.

As Axis 1 has been EOL we recommend you migrate to a different SOAP engine, such as Apache Axis 2/Java. Alternatively you could use a build of Axis with the patch from applied.

The Apache Axis project does not expect to create an Axis 1.x release fixing this problem.

Is CVE-2026-90436 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-90436 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-90436?

Upgrade to a fixed release named by Apache:

  • 41f3b4e8d04e310ca81f86b92630ab2c11d608bd

Confirm against the vendor advisory before you patch.

Affected versions
  • through 1.4

Official advisory · medium-confidence parse· fetched 4 hours ago·verify at source

Fixed versions
  • 41f3b4e8d04e310ca81f86b92630ab2c11d608bd

Official advisory · medium-confidence parse· fetched 4 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • As Axis 1 has been EOL we recommend you migrate to a different SOAP engine, such as Apache Axis 2/Java.
  • Alternatively you could use a build of Axis with the patch from https://github.com/apache/axis-axis1-java/commit/41f3b4e8d04e310ca81f86b92630ab2c11d608bd applied.

Official advisory · medium-confidence parse· fetched 4 hours ago·verify at source

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