CVE-2026-104711 Apache Struts - Expression Language Injection

Apache Struts 2.0.0 through 2.3.37, 2.5.0 through 2.5.33, 6.0.0 through 6.11.0, and 7.0.0 through 7.3.0 contain an expression language injection caused by improper neutralization of OGNL expressions in legacy RESTful action mapper, letting remote attackers execute arbitrary code, exploit requires legacy RESTful action mapper and OGNL allowlist disabled.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
EPSS
1.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Expression Language Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-917

Vendor fix

Upgrade to version 6.12.0 or 7.4.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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