Expression Language Injection Vulnerability in Apache Struts
CVE-2026-104711

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Struts
Vendor
CVE Published:
5 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-104711?

An expression language injection vulnerability exists in Apache Struts that enables attackers to craft specific requests to inject OGNL expressions, potentially leading to remote code execution. This primarily affects applications using the legacy RESTful action mapper when the OGNL allowlist is disabled. Users are advised to update to versions 6.12.0 or 7.4.0, which mitigate this vulnerability.

Affected Version(s)

Apache Struts 2.0.0 <= 2.3.37

Apache Struts 2.5.0 <= 2.5.33

Apache Struts 6.0.0 <= 6.11.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-104711-Advanced-Variant
Created by uday952

CVE-2026-104711-exploit-payload-4
Created by uday952

CVE-2026-104711-POC-Variant3
Created by uday952

References

https://cwiki.apache.org/confluence/display/WW/S2-075
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

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