CVE-2025-66621

Not scored yetLast modified Nov 10, 2026

Description

Apache James SASL OAuthBearer/XOAUTH2 prior versions 3.9.1 fails to validate correctly AUD claim of JWT payloads when introspection is not configured.

This allows an attacker with valid credentials to access the mail server even if they are not authorized to do so.

We recommend users to upgrade to non vulnerable version that forces explicit configuration of aud claims and forces introspection.

Metrics

No CVSS score has been published yet.

Weakness enumeration

CWE-345

Affected software

Vendor	Product	Versions
Apache Software Foundation	Apache James	>= 3.9.0, < 3.9.1

References

Timeline

Published: Nov 6, 2026
Last modified: Nov 10, 2026
NVD status: Deferred

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