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CVE-2026-47085

cyrus-imapd: Cyrus IMAP: Information disclosure via URLAUTH token forgery

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Severity

Moderate

Red Hat Product Security

4

CVSS 3.1

Review impact separately from score.

Published · July 16, 2026

Updated · August 7, 2026

Description

A flaw was found in Cyrus IMAP (cyrus-imapd). A remote attacker could exploit a vulnerability related to URLAUTH token forgery, caused by a missing mailbox key. This could allow the attacker to gain unauthorized read access to a victim's mailbox. The likelihood of exploitation is low due to the obscurity of the URLAUTH feature.

Statement

Moderate: A flaw in Cyrus IMAP (cyrus-imapd) allows for URLAUTH token forgery due to a missing mailbox key, potentially granting a remote attacker unauthorized read access to a victim's mailbox. The impact is limited as the URLAUTH feature is obscure and rarely used, significantly reducing the likelihood of exploitation in typical Red Hat deployments.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

CWE-341 · Predictable from Observable State