> CVE-2026-59884 [HIGH]

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PUBLISHED
2026-07-14 17:17
MODIFIED
2026-07-14 17:17
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.62%
Top 51.1%
DATA SOURCES:
NVD 🔗 2026-07-14 RED HAT 🔗 2026-07-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-05 OSV 🔗 2026-07-20 MSRC 🔗 2026-11-02

> DESCRIPTION

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Hardened Images
Version: 2.19.0

> 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 DETAILED DESCRIPTIONS

CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
An update for Red Hat Hardened Images RPMs is now available.
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.3.6 (CUDA)
Red Hat AI Inference Server Model Optimization Tools 3.3.6 (CUDA) is now available.
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 Enterprise Linux AI 3.3.6 enhancement update
Updated Red Hat Enterprise Linux AI 3.3.6 container images are now available.
Red Hat Security Advisory: Red Hat Enterprise Linux AI 3.3.6 enhancement update
Updated Red Hat Enterprise Linux AI 3.3.6 container disk images are now available.
Red Hat Security Advisory: RHOAI 3.3.7 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: Red Hat AI Inference 3.4.6 (rocm)
Red Hat AI Inference 3.4.6 (rocm) is now available.
Red Hat Security Advisory: RHOAI 3.4.5 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: RHOAI 2.25.12 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> GITHUB SECURITY ADVISORY

GHSA-m4p7-r5rc-7g4j HIGH

pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs

AFFECTED PACKAGES:
PIP / pyasn1
< 0.6.4
Fixed in: 0.6.4

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs

AFFECTED PACKAGES:
Unknown / Unknown
24 versions affected
ALIASES:
GHSA-m4p7-r5rc-7g4j

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/07/2026 17:17
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.
📊 ENRICHISSEMENT 19/07/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
📊 ENRICHISSEMENT 19/07/2026 05:01
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/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5
https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4
https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j
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