> CVE-2026-4926 [HIGH]

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PUBLISHED
2026-03-26 19:17
MODIFIED
2026-03-26 19:17
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.80%
Top 43.0%
DATA SOURCES:
NVD 🔗 2026-03-26 RED HAT 🔗 2026-03-29 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-01

> DESCRIPTION

Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.

> 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: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: Red Hat OpenShift distributed tracing platform (Tempo) 3.9.2 release
Red Hat OpenShift distributed tracing platform (Tempo) 3.9.2 has been released
Red Hat Security Advisory: Red Hat Developer Hub 1.8.6 release.
Red Hat Developer Hub 1.8.6 has been released.
Red Hat Security Advisory: RHTAS 1.3.4 - Red Hat Trusted Artifact Signer Release
The 1.3.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.3.4 - Red Hat Trusted Artifact Signer Release
The 1.3.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.27.1 Release.
Red Hat OpenShift Dev Spaces 3.27.1 has been released.
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.6
Red Hat Security Advisory: Red Hat Developer Hub 1.9.4 release.
Red Hat Developer Hub 1.9.4 has been released.
Red Hat Security Advisory: MTV RHEL9 Images
Updated Release packages that fix several bugs and add various enhancements are now available.
Red Hat Security Advisory: MTV RHEL9 Images
Updated Release packages that fix several bugs and add various enhancements are now available.
Red Hat Security Advisory: Red Hat build of Cryostat 4.2.0: new RHEL 9 container image security update
New Red Hat build of Cryostat 4.2.0 on RHEL 9 container images are now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scori...
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.6
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
An update is now available for Red Hat Ansible Automation Platform 2.5 Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update
An update is now available for Red Hat Ansible Automation Platform 2.6 Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: Red Hat Edge Manager Version 1.0.3 Security Update
Red Hat Edge Manager Version 1.0.3 Security Update
Red Hat Security Advisory: Red Hat Edge Manager Version 1.1.3 Security Update
Red Hat Edge Manager Version 1.1.3 Security Update
Red Hat Security Advisory: Red Hat Edge Manager Version 1.1.3 Security Update
Red Hat Edge Manager Version 1.1.3 Security Update
Red Hat Security Advisory: Migration Toolkit for Applications
A new version of Migration Toolkit for Applications (MTA) is now available.
Red Hat Security Advisory: RHOAI 2.25.11 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-hj66-6f7g-4r5v MODERATE

Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

AFFECTED PACKAGES:
PIP / oauthlib
>= 0.6.1, <= 3.3.1
Fixed in: 4.0.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

path-to-regexp vulnerable to Denial of Service via sequential optional groups

AFFECTED PACKAGES:
Unknown / Unknown
4 versions affected
ALIASES:
GHSA-j3q9-mxjg-w52f

> HISTORIQUE DES MODIFICATIONS

Première apparition
26/03/2026 19:17
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne 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...
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 01/04/2026 06:02
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 29/03/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 29/03/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 4 Dernière mise à jour: 5 months ago

> REFERENCES

https://cna.openjsf.org/security-advisories.html
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