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Vulnerabilidades / CVE-2025-12543

crítica

CVE-2025-12543

undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache Poisoning and SSRF

Publicada Modificada CWE 20
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.

Severidad por fuente

NVD9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
GHSA9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Red Hat9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, GHSA. Más baja según Red Hat (alta), Ubuntu (alta).

Descripción

A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perform internal network scans, or hijack user sessions.

Paquetes afectados y versiones corregidas

FuentePaqueteCorregido en
maven::GitHub Security Advisory Mavenio.undertow:undertow-core2.3.21.Final, 2.2.39.Final
chainguardwildfly39.0.0-r0
debian 14undertowsin corrección indicada
ubuntu 16.04-ESMundertow1.3.16-1ubuntu0.1~esm1
ubuntu 18.04-ESMundertow1.4.23-3ubuntu0.1~esm1
ubuntu 20.04-ESMundertow2.0.29-1ubuntu0.1~esm1
ubuntu 22.04undertowsin corrección indicada
ubuntu 24.04undertowsin corrección indicada
ubuntu 26.04undertow2.3.20-1ubuntu1
ubuntu 26.10undertow2.3.20-1ubuntu1
wolfiwildfly39.0.0-r0

Referencias

Las 34 referencias

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.