> CVE-2026-102556 [HIGH]

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PUBLISHED
2026-09-29 17:17
MODIFIED
2026-09-29 17:17
CVSS_SCORE V3
8.6
EPSS (Prob. Exploit)
0.27%
Top 81.4%
DATA SOURCES:
NVD đź”— 2026-09-29 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-21 OSV đź”— 2026-10-19 MSRC đź”— 2026-10-04

> DESCRIPTION

A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.

> 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:L/PR:N/UI:N/S:U/C:L/I:L/A:H
EXPLOITABILITY
3.9
IMPACT
4.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
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
Low (L)
Peu de conditions requises 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
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-843

> CWE DETAILED DESCRIPTIONS

CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') - The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: libsoup security update
An update for libsoup is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: libsoup3 security update
An update for libsoup3 is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: libsoup security update
An update for libsoup is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Libsoup: libsoup: heap buffer overflow from websocket pong signal type confusion

AFFECTED PACKAGES:
Unknown / Unknown
262 versions affected
Unknown / Unknown
262 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
29/09/2026 17:17
Source: NVD
đź“Š ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') - The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses th...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://access.redhat.com/security/cve/CVE-2026-102556
https://bugzilla.redhat.com/show_bug.cgi?id=2543229
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