> CVE-2026-44660 [HIGH]

« BACK_TO_HOME
PUBLISHED
2026-05-27 21:16
MODIFIED
2026-05-27 21:16
CVSS_SCORE V3
8.7
EPSS (Prob. Exploit)
0.42%
Top 63.6%
DATA SOURCES:
NVD đź”— 2026-05-27 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-02

> DESCRIPTION

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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-401

> CWE DETAILED DESCRIPTIONS

CWE-401: Missing Release of Memory after Effective Lifetime - The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: RHOAI 2.25.9 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-rhel9 container image
A new satellite/iop-host-inventory-rhel9 container image is now generally available in the Red Hat container registry.
Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-rhel9 container image
A new satellite/iop-host-inventory-rhel9 container image is now generally available in the Red Hat container registry.
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: 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.

> GITHUB SECURITY ADVISORY

GHSA-c38f-wx89-p2xg HIGH

UltraJSON has a Memory Leak in ujson.dump() on Write Failure

AFFECTED PACKAGES:
PIP / ujson
<= 5.12.0
Fixed in: 5.12.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

UltraJSON: Memory Leak in ujson.dump() on Write Failure

AFFECTED PACKAGES:
Unknown / Unknown
28 versions affected
ALIASES:
GHSA-c38f-wx89-p2xg, PYSEC-2026-2293

> HISTORIQUE DES MODIFICATIONS

Première apparition
27/05/2026 21:16
Source: NVD
đź“Š ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-401: Missing Release of Memory after Effective Lifetime - The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocatio...
Total des modifications: 1 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/ultrajson/ultrajson/commit/82af1d0ac01d09aa40c887b460d44b9d9f...
https://github.com/ultrajson/ultrajson/releases/tag/5.12.1
https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg
« BACK_TO_HOME