Vulnerability in Apache Software Foundation Apache Struts

[ Description ]Official description

Concurrent execution using shared resource with improper synchronization ('race condition') vulnerability in Apache Struts. Where a localized message formats a date or time argument, the formatter retained for that message by the application-wide text provider is used by concurrently served requests without isolation, so a value belonging to one user can appear in another user's response, or the rendering can fail and surface as a server error. Applications whose localized messages format no date or time arguments are not affected. This issue affects Apache Struts: from 2.0.0 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0. Users are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.

[ Fixes ]Fixes and patches

• Security bulletin: Apache Struts S2-077Vendor patch or bulletin · CERT-FR · cwiki.apache.org/confluence/display/WW/S2-077, cited by CERT-FR CERTFR-2026-AVI-1290
• Security bulletin: Apache Struts S2-076Vendor patch or bulletin · CERT-FR · cwiki.apache.org/confluence/display/WW/S2-076, cited by CERT-FR CERTFR-2026-AVI-1290
• Security bulletin: Apache Struts S2-075Vendor patch or bulletin · CERT-FR · cwiki.apache.org/confluence/display/WW/S2-075, cited by CERT-FR CERTFR-2026-AVI-1290
• Security bulletin: Apache Struts S2-078Vendor patch or bulletin · CERT-FR · cwiki.apache.org/confluence/display/WW/S2-078, cited by CERT-FR CERTFR-2026-AVI-1290

[ Advisories ]Government CERT advisories

• CERT-FR9 Oct 2026CERTFR-2026-AVI-1290

  Multiple vulnerabilities in Apache Struts Translated from French

  Multiple vulnerabilities have been discovered in Apache Struts. Some of them allow an attacker to cause remote arbitrary code execution, remote denial of service and a breach of data confidentiality. The vendor states…

  CVE-2026-104714CVE-2026-104711CVE-2026-104713+1 more CVEs
• BSI CERT-Bund4 Oct 2026WID-SEC-2026-3723

  Apache Struts: Multiple vulnerabilities Translated from German

  CVE-2026-104711CVE-2026-104714CVE-2026-104713+1 more CVEs

[ References ]References

• cwiki.apache.org/confluence/display/WW/S2-078Vendor Advisory
• www.openwall.com/lists/oss-security/2026/10/05/13Mailing ListThird Party Advisory