> CVE-2026-49477 [HIGH]

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PUBLISHED
2026-07-14 21:17
MODIFIED
2026-07-14 21:17
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.64%
Top 49.1%
DATA SOURCES:
NVD 🔗 2026-07-14 RED HAT 🔗 2026-07-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-02

> DESCRIPTION

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Hardened Images
Version: 26.1.0
Red Hat - Red Hat Hardened Images
Version: 2026.6.3

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-400 CWE-1333

> CWE DETAILED DESCRIPTIONS

CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource. | CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: RHOAI 3.4.4 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: Red Hat Quay 3.15.8
Red Hat Quay 3.15.8 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.9.26
Red Hat Quay 3.9.26 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.10.26
Red Hat Quay 3.10.26 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.12.22
Red Hat Quay 3.12.22 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.16.6
Red Hat Quay 3.16.6 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.14.9
Red Hat Quay 3.14.9 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.17.5
Red Hat Quay 3.17.5 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay
A new version of Red Hat Quay is now available.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-836r-79rf-4m37 HIGH

Soup Sieve: Regular Expression Denial of Service (ReDoS) via Selector Parser

AFFECTED PACKAGES:
PIP / soupsieve
<= 2.8.3
Fixed in: 2.8.4

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Soup Sieve: Regular Expression Denial of Service (ReDoS) in soupsieve Selector Parser

AFFECTED PACKAGES:
Unknown / Unknown
48 versions affected
ALIASES:
GHSA-836r-79rf-4m37, PYSEC-2026-3072

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/07/2026 21:17
Source: NVD
📊 ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource. | CWE-1333: Inefficient Regular Expression Complexity - The pro...
📊 ENRICHISSEMENT 19/07/2026 05:00
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 19/07/2026 05:00
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 3 months ago

> REFERENCES

https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b...
https://github.com/facelessuser/soupsieve/releases/tag/2.8.4
https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m3...
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