CVE-2026-104714: Apache Struts: Shared message formatter exposes date and time values across concurrent requests

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-05 · updated 2026-10-08
Weakness: CWE-362

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.

Affected products

Apache Struts: from 2.0.0 through 2.3.37; from 2.5.0 through 2.5.33; from 6.0.0 before 6.12.0; from 7.0.0 before 7.4.0 — fixed in 6.12.0, 7.4.0

How to fix

Upgrade to a fixed version: Apache Struts 6.12.0, 7.4.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-104714 or the next vulnerability affects your stack