CVE-2026-24880

EUVD-2026-21006
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.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
UNKNOWN
---
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apachetomcat
𝑥
≤ 11.0.18
CNA
apachetomcat
𝑥
≤ 10.1.52
CNA
apachetomcat
9.0.0.M1 ≤
𝑥
≤ 9.0.115
CNA
apachetomcat
8.5.0 ≤
𝑥
≤ 8.5.100
CNA
apachetomcat
7.0.0 ≤
𝑥
≤ 7.0.109
CNA