> CVE-2026-32600 [HIGH]

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PUBLISHED
2026-03-16 14:19
MODIFIED
2026-03-16 14:53
CVSS_SCORE V3
8.2
EPSS (Prob. Exploit)
0.15%
Top 95.7%
DATA SOURCES:
NVD 🔗 2026-03-16 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-08

> DESCRIPTION

xml-security is a library that implements XML signatures and encryption. Prior to versions 2.3.1 and 1.13.9, XML nodes encrypted with either aes-128-gcm, aes-192-gcm, or aes-256-gcm lack validation of the authentication tag length. An attacker can use this to brute-force an authentication tag, recover the GHASH key, and decrypt the encrypted nodes. It also allows to forge arbitrary ciphertexts without knowing the encryption key. This vulnerability is fixed in 2.3.1 and 1.13.9.

> 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:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EXPLOITABILITY
3.9
IMPACT
4.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
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
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-354

> CWE DETAILED DESCRIPTIONS

CWE-354: Improper Validation of Integrity Check Value - The product does not validate or incorrectly validates the integrity check values or "checksums" of a message.

> GITHUB SECURITY ADVISORY

GHSA-r353-4845-pr5p HIGH

simplesamlphp/xml-security: Missing AES-GCM Authentication Tag Validation on Encrypted Nodes Allows for Unauthorized Decryption

AFFECTED PACKAGES:
COMPOSER / simplesamlphp/xml-security
< 1.13.9
Fixed in: 1.13.9
COMPOSER / simplesamlphp/xml-security
>= 2.0.0, < 2.3.1
Fixed in: 2.3.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

xml-security is Missing AES-GCM Authentication Tag Validation on Encrypted Nodes Allows for Unauthorized Decryption

AFFECTED PACKAGES:
Unknown / Unknown
115 versions affected
ALIASES:
GHSA-r353-4845-pr5p

> HISTORIQUE DES MODIFICATIONS

Première apparition
16/03/2026 14:19
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:58
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-354: Improper Validation of Integrity Check Value - The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detectin...
Nouvelle valeur:
CWE-354: Improper Validation of Integrity Check Value - The product does not validate or incorrectly validates the integrity check values or "checksums" of a message.
📊 ENRICHISSEMENT 01/04/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-354: Improper Validation of Integrity Check Value - The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detectin...
Total des modifications: 2 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/simplesamlphp/xml-security/commit/cad6d57cf0a5a0b7e0cc4e4a5b1...
https://github.com/simplesamlphp/xml-security/commit/fdc12449e959c610943f9fd428e...
https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-r353-4845...
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