CVE-2026-42602
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk13th percentile - higher than 13% of all known CVEs
Summary
Podatność CVE-2026-42602 dotyczy rozszerzenia Azure Authenticator, które w wersjach od 0.124.0 do 0.150.0 ma lukę w autoryzacji po stronie serwera. Umożliwia to każdej osobie posiadającej ważny token dostępu Azure autoryzację do dowolnego odbiornika OpenTelemetry, który używa autoryzacji 'azure_auth'.
Risk Assessment
Ryzyko dla organizacji polega na tym, że atakujący może wykorzystać ważny token dostępu do uzyskania nieautoryzowanego dostępu do zasobów, co może prowadzić do wycieku danych lub nieautoryzowanych operacji na systemach.
Recommendation
Zaleca się aktualizację rozszerzenia Azure Authenticator do najnowszej wersji oraz wdrożenie dodatkowych mechanizmów weryfikacji tokenów, aby zapobiec ich nadużywaniu.
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Original NVD description (English source)
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).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

