CVE-2026-24880: CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in Apache Software Foundation Apache Tomcat
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.
AI Analysis
Technical Summary
This vulnerability in Apache Tomcat arises from inconsistent parsing of HTTP requests due to invalid chunk extensions, leading to HTTP Request/Response Smuggling (CWE-444). It affects a wide range of Tomcat versions including 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.115, 10.1.0-M1 through 10.1.52, and 11.0.0-M1 through 11.0.18. The issue allows an attacker to craft specially formed HTTP requests that may be interpreted differently by front-end and back-end servers, potentially leading to request smuggling attacks. The Apache Software Foundation has released fixed versions 11.0.20, 10.1.52, and 9.0.116 to resolve this vulnerability.
Potential Impact
The vulnerability enables HTTP Request/Response Smuggling due to inconsistent HTTP request parsing, which can undermine the integrity of HTTP communications handled by Apache Tomcat. This may allow attackers to bypass security controls, poison web caches, or perform other malicious actions depending on the deployment context. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.20, 10.1.52, or 9.0.116 as these releases contain the official fixes for this vulnerability. No other mitigation or temporary workaround is specified. Patch status is confirmed by the vendor advisory recommending these upgrade versions.
CVE-2026-24880: CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in Apache Software Foundation Apache Tomcat
Description
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Tomcat arises from inconsistent parsing of HTTP requests due to invalid chunk extensions, leading to HTTP Request/Response Smuggling (CWE-444). It affects a wide range of Tomcat versions including 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.115, 10.1.0-M1 through 10.1.52, and 11.0.0-M1 through 11.0.18. The issue allows an attacker to craft specially formed HTTP requests that may be interpreted differently by front-end and back-end servers, potentially leading to request smuggling attacks. The Apache Software Foundation has released fixed versions 11.0.20, 10.1.52, and 9.0.116 to resolve this vulnerability.
Potential Impact
The vulnerability enables HTTP Request/Response Smuggling due to inconsistent HTTP request parsing, which can undermine the integrity of HTTP communications handled by Apache Tomcat. This may allow attackers to bypass security controls, poison web caches, or perform other malicious actions depending on the deployment context. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.20, 10.1.52, or 9.0.116 as these releases contain the official fixes for this vulnerability. No other mitigation or temporary workaround is specified. Patch status is confirmed by the vendor advisory recommending these upgrade versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-01-27T18:06:58.294Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d7ff941cc7ad14da10e9c2
Added to database: 4/9/2026, 7:35:48 PM
Last enriched: 4/9/2026, 7:52:04 PM
Last updated: 4/10/2026, 8:15:30 AM
Views: 5
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