> CVE-2026-54696 [LOW]

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PUBLISHED
2026-06-30 23:17
MODIFIED
2026-06-30 23:17
CVSS_SCORE V3
3.7
EPSS (Prob. Exploit)
0.41%
Top 64.6%
DATA SOURCES:
NVD 🔗 2026-07-01 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-02

> DESCRIPTION

Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.

> 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:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EXPLOITABILITY
2.2
IMPACT
1.4

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
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
High (H)
Conditions spécifiques doivent être réunies 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
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-122 CWE-131 CWE-787

> CWE DETAILED DESCRIPTIONS

CWE-122: Heap-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the heap. | CWE-131: Incorrect Calculation of Buffer Size - The product does not correctly calculate the size to be used when allocating a buffer. | CWE-787: Out-of-bounds Write - The product writes data past the end, or before the beginning, of the intended buffer.

> 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 Hardened Images RPMs bug fix and enhancement update
An update for Red Hat Hardened Images RPMs is now available.

> GITHUB SECURITY ADVISORY

GHSA-x2f5-4prf-w687 LOW

Ruby json: JSON generator heap buffer overflow when streaming to an IO

AFFECTED PACKAGES:
RUBYGEMS / json
>= 2.9.0, < 2.19.9
Fixed in: 2.19.9

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Ruby JSON: JSON generator heap buffer overflow when streaming to an IO

AFFECTED PACKAGES:
Unknown / Unknown
33 versions affected
ALIASES:
GHSA-x2f5-4prf-w687

> HISTORIQUE DES MODIFICATIONS

Première apparition
30/06/2026 23:17
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-122: Heap-based Buffer Overflow - A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the bu...
Nouvelle valeur:
CWE-122: Heap-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the heap. | CWE-131: Incorrect Calculation of Buffer Size - The product does not correctly calcu...
📊 ENRICHISSEMENT 01/07/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-122: Heap-based Buffer Overflow - A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the bu...
Total des modifications: 2 Dernière mise à jour: 5 days ago

> REFERENCES

https://github.com/ruby/json/releases/tag/v2.19.9
https://github.com/ruby/json/security/advisories/GHSA-x2f5-4prf-w687
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