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PUBLISHED

2026-03-27 17:16

MODIFIED

2026-03-27 17:16

CVSS_SCORE V3

8.7

EPSS (Prob. Exploit)

0.72%

Top 45.9%

DATA SOURCES:

NVD 🔗 2026-03-27 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05

> DESCRIPTION

A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

EXPLOITABILITY

2.2

IMPACT

5.8

> MÉTRIQUES CVSS DÉTAILLÉES

                CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
            

Métrique	Valeur	Interprétation
AV (Vecteur d'Attaque) Attack Vector	Network (N)	Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque) Attack Complexity	High (H)	Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis) Privileges Required	None (N)	Aucune authentification requise
UI (Interaction Utilisateur) User Interaction	None (N)	Aucune interaction utilisateur nécessaire
S (Périmètre) Scope	Changed (C)	Impact s'étend au-delà du composant compromis
C (Impact Confidentialité) Confidentiality Impact	High (H)	Divulgation totale d'informations
I (Impact Intégrité) Integrity Impact	High (H)	Modification totale des données possible
A (Impact Disponibilité) Availability Impact	None (N)	Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité

High

Divulgation totale d'informations

Intégrité

High

Modification totale des données possible

Disponibilité

None

Aucune interruption de service

> WEAKNESSES

CWE-444

> CWE DETAILED DESCRIPTIONS

CWE-444: Inconsistent Interpretation of HTTP Requests - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

> RED HAT SECURITY ADVISORIES

RHSA-2026:25125 IMPORTANT

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.6 security update

A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabilit...

RHSA-2026:25126 IMPORTANT

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.6 security update

> GITHUB SECURITY ADVISORY

GHSA-3gv6-g396-9v4r HIGH

Undertow is Vulnerable to HTTP Request/Response Smuggling

AFFECTED PACKAGES:

MAVEN / io.undertow:undertow-core

< 2.2.40.Final

Fixed in: 2.2.40.Final

MAVEN / io.undertow:undertow-core

>= 2.3.0.Final, < 2.3.25.Final

Fixed in: 2.3.25.Final

> HISTORIQUE DES MODIFICATIONS

Première apparition

27/03/2026 17:16

Source: NVD

📊 ENRICHISSEMENT 01/11/2026 06:59

CWE

Champ modifié: Description CWE

Ancienne valeur:

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow betwe...

Nouvelle valeur:

CWE-444: Inconsistent Interpretation of HTTP Requests - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a c...

📊 ENRICHISSEMENT 01/04/2026 06:02

CWE