🛡️ CVE-2026-47083 on Debian — cyrus-imapd

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an ESEARCH cross-user content oracle. By using the ESEARCH command, an authenticated IMAP user could enumerate folder names under any account they could name. Search would return UIDs of messages matching the search, creating a content oracle (without allowing arbitrary reads of the target's content).

Distribution advisory

This page covers CVE-2026-47083 as tracked by Debian, for the package cyrus-imapd. The fix is available in version 3.12.3-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

DEBIAN-CVE-2026-47083 is classified as CWE-204: Observable Response Discrepancy. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.

Affected software

DEBIAN-CVE-2026-47083 is recorded against 1 package.

cyrus-imapd (fixed in 3.12.3-1)

Timeline and source

Published on 16 July 2026 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-07-16

Updated 2026-08-20

Modified 2026-08-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
cyrus-imapd	—	3.12.3-1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2026-47083

🔗 NVD 🔗 Mitre

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