> CVE-2026-59886 [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 univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float conversion through prettyPrint(), str(), comparison, arithmetic, int(), or an explicit float() call to consume excessive CPU and memory and hang applications that decode untrusted ASN.1 data and then print, log, or compare decoded objects. This issue is fixed in version 0.6.4.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Hardened Images
Version: 8

> 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-770

> CWE DETAILED DESCRIPTIONS

CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource. | CWE-770: Allocation of Resources Without Limits or Throttling - The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

> RED HAT SECURITY ADVISORIES

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Red Hat Quay 3.15.7 is now available with bug fixes.
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Red Hat Quay 3.9.25 is now available with bug fixes.
Red Hat Security Advisory: RHTAS 1.4 - GA Release of Model Transparency 1.0.3
The GA release of the RHTAS Model Transparency CLI image. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4
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Red Hat Quay 3.12.21 is now available with bug fixes.
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Red Hat Quay 3.10.25 is now available with bug fixes.
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A new version of Migration Toolkit for Applications (MTA) is now available.
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An update for fence-agents is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common...
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An update for fence-agents is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Ha...
Red Hat Security Advisory: resource-agents security update
An update for resource-agents is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red...
Red Hat Security Advisory: resource-agents security update
An update for resource-agents is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product S...
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An update for resource-agents is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red...
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An update for fence-agents is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important...
Red Hat Security Advisory: fence-agents security update
An update for fence-agents is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important...
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An update for python-pyasn1 is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Commo...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 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 Sy...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 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 Sy...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red H...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 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 S...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red H...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Importan...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Comm...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Sec...
Red Hat Security Advisory: python-pyasn1 security update
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Importan...
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An update for python-pyasn1 is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Comm...
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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 (...
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The 1.3.7 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: resource-agents security update
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An update is now available for Red Hat Ansible Automation Platform 2.5
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Updated images are now available for Red Hat OpenShift AI.
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Updated Red Hat Enterprise Linux AI 3.3.6 container images are now available.
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Updated Red Hat Enterprise Linux AI 3.3.6 container disk images are now available.
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The latest release of Red Hat Update Infrastructure. For more details, see the product documentation.
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: RHOAI 3.3.7 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
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: General availability of the satellite/iop-advisor-backend-rhel9 container image
A new satellite/iop-advisor-backend-rhel9 container image is now generally available in the Red Hat container registry.
Red Hat Security Advisory: Release of components for Service Telemetry Framework 1.5.7
Release of components for the Service Telemetry Framework
Red Hat Security Advisory: Red Hat Quay
A new version of Red Hat Quay is now available.
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Red Hat AI Inference 3.4.6 (rocm) is now available.
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> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-hm4w-wwcw-mr6r HIGH

pyasn1: Uncontrolled resource consumption when converting decoded REAL values

AFFECTED PACKAGES:
PIP / pyasn1
<= 0.6.3
Fixed in: 0.6.4

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

pyasn1: Uncontrolled resource consumption when converting decoded REAL values

AFFECTED PACKAGES:
Unknown / Unknown
24 versions affected
ALIASES:
GHSA-hm4w-wwcw-mr6r

> 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. | CWE-770: Allocation of Resources Without Limits or Throttling...
📊 ENRICHISSEMENT 19/07/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "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/e60c691cb91addb8fcefa2f537e85ede6fb1e886
https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4
https://github.com/pyasn1/pyasn1/security/advisories/GHSA-hm4w-wwcw-mr6r
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