CVE-2026-73208 Affecting dovecot23-backend-pgsql package, versions <2.3.21.1-150200.76.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.31% (22nd percentile)

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  • Snyk IDSNYK-SLES155-DOVECOT23BACKENDPGSQL-20256163
  • published29 Sept 2026
  • disclosed14 Sept 2026

Introduced: 14 Sep 2026

CVE-2026-73208  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 dovecot23-backend-pgsql to version 2.3.21.1-150200.76.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dovecot23-backend-pgsql package and not the dovecot23-backend-pgsql package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and checked against the configured required scopes. These are different concepts, and the audience claim does not describe what a token is allowed to do. A token that grants no relevant permissions can be accepted because its intended recipient value happens to match a configured scope name, granting access that should have been denied. It also hides an identity provider misconfiguration where scopes are not being issued at all. Ensure the identity provider issues a scope claim for all tokens used with Dovecot, and that configured scope names do not match audience values. Update to non-vulnerable version. No publicly available exploits are known.

CVSS Base Scores

version 3.1