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 configure…
Exact source revision recorded 28 Oct 2026 05:15:25 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-30160
Publishedazureauthextension 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).
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Original publisher date fields
datePublished: May 13, 2026, 8:12:18 PM
dateUpdated: May 14, 2026, 12:52:53 PM
- Source published
- May 13, 2026, 8:12:18 PM (timezone not stated)
- Source modified
- May 14, 2026, 12:52:53 PM (timezone not stated)
- Observed here
- 28 Oct 2026 05:15:25 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
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EUVD CVSS 3.1 · 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H