> CVE-2026-40890 [HIGH]

« BACK_TO_HOME
PUBLISHED
2026-04-21 20:17
MODIFIED
2026-04-21 20:17
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.52%
Top 56.9%
DATA SOURCES:
NVD 🔗 2026-04-21 RED HAT 🔗 2026-04-26 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-05 OSV 🔗 2026-09-13 MSRC 🔗 2026-11-02

> DESCRIPTION

The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

> 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-125

> CWE DETAILED DESCRIPTIONS

CWE-125: Out-of-bounds Read - The product reads data past the end, or before the beginning, of the intended buffer.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Multicluster Global Hub 1.5.4 security update
Multicluster Global Hub v1.5.4 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: Multicluster Global Hub 1.4.5 security update
Multicluster Global Hub v1.4.5 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: Multicluster Global Hub 1.6.2 security update
Multicluster Global Hub v1.6.2 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: Multicluster Global Hub 1.7.1 security update
Multicluster Global Hub v1.7.1 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.15.3 security update
Red Hat Advanced Cluster Management for Kubernetes 2.15 General Availability release images, which add new features and enhancements, bug fixes, and updated container images.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-77fj-vx54-gvh7 HIGH

Go Markdown has an Out-of-bounds Read in SmartypantsRenderer

AFFECTED PACKAGES:
GO / github.com/gomarkdown/markdown
< 0.0.0-20260411013819-759bbc3e3207
Fixed in: 0.0.0-20260411013819-759bbc3e3207

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

AFFECTED PACKAGES:
Unknown / Unknown
ALIASES:
GHSA-77fj-vx54-gvh7, GO-2026-5208

> HISTORIQUE DES MODIFICATIONS

Première apparition
21/04/2026 20:17
Source: NVD
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-125: Out-of-bounds Read - The product reads data past the end, or before the beginning, of the intended buffer.
📊 ENRICHISSEMENT 26/04/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 26/04/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 6 months ago

> REFERENCES

https://github.com/gomarkdown/markdown/commit/759bbc3e32073c3bc4e25969c132fc520e...
https://github.com/gomarkdown/markdown/security/advisories/GHSA-77fj-vx54-gvh7
« BACK_TO_HOME