> CVE-2026-42602 [HIGH]

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PUBLISHED
2026-05-13 21:16
MODIFIED
2026-05-13 21:16
CVSS_SCORE V3
8.1
EPSS (Prob. Exploit)
0.22%
Top 87.2%
DATA SOURCES:
NVD đź”— 2026-05-13 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-02

> DESCRIPTION

azureauthextension is the Azure Authenticator Extension. From 0.124.0 to 0.150.0, a server-side authentication bypass in azureauthextension allows any party who holds a single valid Azure access token for any scope the collector's configured identity can mint for to authenticate to any OpenTelemetry receiver that uses auth: azure_auth. The extension's Authenticate method does not validate incoming bearer tokens as JWTs. Instead, it calls its own configured credential to obtain an access token and compares the client's token to the result with string equality — and the scope for that server-side token request is taken from the client-supplied Host header. As a result, a token minted for any Azure resource the service principal has ever been issued a token for (ARM, Graph, Key Vault, Storage, etc.) will authenticate to the collector if the attacker picks a matching Host. Tokens are replayable for the full issued lifetime (commonly several hours for managed identity tokens).

> 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:L/UI:N/S:U/C:N/I:H/A:H
EXPLOITABILITY
2.8
IMPACT
5.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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
Low (L)
Authentifié avec compte utilisateur basique
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
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-208 CWE-287 CWE-290 CWE-294 CWE-347

> CWE DETAILED DESCRIPTIONS

CWE-208: Observable Timing Discrepancy - Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. | CWE-287: Improper Authentication - When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. | CWE-290: Authentication Bypass by Spoofing - This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. | CWE-294: Authentication Bypass by Capture-replay - A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). | CWE-347: Improper Verification of Cryptographic Signature - The product does not verify, or incorrectly verifies, the cryptographic signature for data.

> GITHUB SECURITY ADVISORY

GHSA-pjv4-3c63-699f HIGH

opentelemetry-collector-contrib's azureauthextension Authenticate method does not validate bearer tokens, allowing auth bypass via replay

AFFECTED PACKAGES:
GO / github.com/open-telemetry/opentelemetry-collector-contrib/extension/azureauthextension
>= 0.124.0, <= 0.150.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

azureauthextension Authenticate method does not validate bearer tokens, allowing auth bypass via replay

AFFECTED PACKAGES:
Unknown / Unknown
8723 versions affected
ALIASES:
GHSA-pjv4-3c63-699f, GO-2026-5544

> HISTORIQUE DES MODIFICATIONS

Première apparition
13/05/2026 21:16
Source: NVD
đź“Š ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-208: Observable Timing Discrepancy - Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant infor...
Total des modifications: 1 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advis...
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