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Critical severity · published Oct 5, 2026
CVE-2026-104711
Apache Struts: OGNL injection in the legacy RESTful action mapper
9.8
CVSS
1.4%
EPSS
No
On KEV
Description
Improper neutralization of special elements used in an expression language statement ('Expression Language Injection') vulnerability in Apache Struts. If the application is configured to use the legacy RESTful action mapper, a crafted request can inject an OGNL expression that may lead to remote code execution. Struts 7 is affected only when the OGNL allowlist is disabled; it is enabled by default. Applications using the default action mapper, the restful2 mapper, or the Struts REST plugin 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ST
Struts · Apache
2.0.0 through 2.3.37; 2.5.0 through 2.5.33; 6.0.0 through 6.11.0; 7.0.0 through 7.3.0 · source: vendor, NVD
Affected product
ST
Struts
Apache
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104711
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104711
vendor-advisory
https://cwiki.apache.org/confluence/display/WW/S2-075
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