CVE-2026-24880

Apache Tomcat: Request smuggling via invalid chunk extension

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.

Scores

Weaknesses (CWE)

• CWE-444

Advisories

• GHSA-563x-q5rq-57qp — Apache Tomcat has an HTTP Request/Response Smuggling vulnerability

European references

• ENISA EUVD · EUVD-2026-21006
• GCVE · GCVE-0-2026-24880

CERT-FR advisories

• CERTFR-2026-AVI-0958 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0933 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0621 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0556 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0418 — Multiples vulnérabilités dans Apache Tomcat · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 9.0.0 < 9.0.116
• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 10.1.0 < 10.1.53
• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 11.0.0 < 11.0.20

Affected products

References

• https://lists.apache.org/thread/2c682qnlg2tv4o5knlggqbl9yc2gb5sn
• http://www.openwall.com/lists/oss-security/2026/04/09/20

Sources