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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.

PUBLISHED Reserved 2026-01-27 | Published 2026-04-09 | Updated 2026-04-10 | Assigner apache

Problem types

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Product status

Default status
unaffected

11.0.0-M1 (semver)
affected

10.1.0-M1 (semver)
affected

9.0.0.M1 (semver)
affected

8.5.0 (semver)
affected

7.0.0 (semver)
affected

Any version before 7.0.0
unknown

8.0.0-RC1 (semver)
unknown

Credits

Xclow3n finder

References

www.openwall.com/lists/oss-security/2026/04/09/20

lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn vendor-advisory

cve.org (CVE-2026-24880)

nvd.nist.gov (CVE-2026-24880)

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