CVE-2026-86350

Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up

CRITICAL 9.1

En bref

Source: NVD
EPSS: EPSS 0.48 % · centile 42 (2026-10-28)
État: PUBLISHED
Publiée: 2026-09-23 11:31 UTC
Mise à jour: 2026-09-23 16:17 UTC
Attribuée par: apache
Statut NVD: Awaiting Analysis

Description

Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Faiblesses (CWE)

CWE-444 — Dissimulation de requête ou de réponse HTTP

Références

https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	CRITICAL 9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP
CVSS 3.1	CRITICAL 9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Références européennes

ENISA EUVD · EUVD-2026-85235
GCVE · GCVE-0-2026-86350

Avis du CERT-FR

CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1218 — Multiples vulnérabilités dans Apache Tomcat · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
Apache Software Foundation · Apache Tomcat	affected 11.0.22 ≤ 11.0.25 ; affected 10.1.55 ≤ 10.1.59 ; affected 9.0.118 ≤ 9.0.121

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD