critical · 9.1

Apache Tomcat: JNDIRealm bind credential validation fails open for non-GSSAPI SASL mechanisms

CVE-2026-101296 · published 20 Oct 2026

How serious is it

  • Severity: critical, CVSS score 9.1 out of 10.
  • No exploit prediction (EPSS) score yet.
  • Not on the CISA list of exploited vulnerabilities.
  • No public exploit in Exploit-DB.

Is your app affected by CVE-2026-101296?

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Who is affected

  • Apache Software Foundation Apache Tomcat: 11.0.0-M1 to <= 11.0.26, 10.1.0-M1 to <= 10.1.60, 9.0.0.M1 to <= 9.0.122, 8.5.0 to <= 8.5.100

How to check

  1. Find out whether you run the affected product and which version, then compare it with the versions above.

How to fix

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  1. Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
  2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

A missing critical step in authentication vulnerability in Apache Tomcat when the JNDI realm was configured with with a non GSSAPI SASL authentication mechanism allowed attackers to authenticate without providing the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.26, from 10.1.0-M1 through 10.1.60, from 9.0.0.M1 through 9.0.122. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.

Check your whole app

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References

Merged from CVE List. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON

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