---
title: "CVE-2026-104711: Apache Struts - Expression Language Injection"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-104711/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-104711)

## 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](https://cwe.mitre.org/data/definitions/917.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-104711](https://nvd.nist.gov/vuln/detail/CVE-2026-104711)
- [https://cwiki.apache.org/confluence/display/WW/S2-075](https://cwiki.apache.org/confluence/display/WW/S2-075)
- [http://www.openwall.com/lists/oss-security/2026/10/05/10](http://www.openwall.com/lists/oss-security/2026/10/05/10)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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