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Schwachstellen / CVE-2025-12543

kritisch

CVE-2025-12543

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

Veröffentlicht Geändert CWE 20
In der Trivy Database seit spätestens 24. Okt. 2026, 07:11 UTCWann der Eintrag vor diesem Build hinzukam, ist nicht erfasst.

Einstufung nach Quelle

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

Trivys eigenes Label ist CRITICAL. Kritisch laut NVD, GHSA. Niedriger laut Red Hat (hoch), Ubuntu (hoch).

Beschreibung

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.

Betroffene Pakete und behobene Versionen

QuellePaketBehoben in
maven::GitHub Security Advisory Mavenio.undertow:undertow-core2.3.21.Final, 2.2.39.Final
chainguardwildfly39.0.0-r0
debian 14undertowkein Fix angegeben
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 22.04undertowkein Fix angegeben
ubuntu 24.04undertowkein Fix angegeben
ubuntu 26.04undertow2.3.20-1ubuntu1
ubuntu 26.10undertow2.3.20-1ubuntu1
wolfiwildfly39.0.0-r0

Referenzen

Alle 34 Referenzen

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.