# SUSE-SU-2026:21208-1: dovecot24 security update

SUSE-SU-2026:21208-1, released April 16, 2026, fixes 10 CVEs in dovecot24 (version 2.4.3-160000.1.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/suse-su-2026-21208-1
- Platform: Linux
- Released: Apr 16, 2026
- Priority: High (Closes CVE-2026-27858, high severity)
- CVEs: 10, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2026:21208-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [dovecot24](https://patchblox.com/security/data/product/linux/dovecot24.md) | sles 16.0 | 2.4.3-160000.1.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-27858](https://patchblox.com/security/data/cve/CVE-2026-27858.md) | High | dovecot23: pigeonhole: managesieve-login can allocate large amount of memory during authentication (bsc#1260901). | 7.5 | 0.0080 |  |
| [CVE-2025-59032](https://patchblox.com/security/data/cve/CVE-2025-59032.md) | High | dovecot23: pigeonhole: ManageSieve panic occurs with sieve-connect as a client (bsc#1260902). | 7.5 | 0.0073 |  |
| [CVE-2026-27857](https://patchblox.com/security/data/cve/CVE-2026-27857.md) | High | dovecot23: sending excessive parenthesis causes imap-login to use excessive memory (bsc#1260898). | 7.5 | 0.0068 |  |
| [CVE-2025-59028](https://patchblox.com/security/data/cve/CVE-2025-59028.md) | High | dovecot23: Invalid base64 authentication can cause DoS for other logins (bsc#1260894). | 7.5 | 0.0046 |  |
| [CVE-2026-24031](https://patchblox.com/security/data/cve/CVE-2026-24031.md) | High | dovecot24: SQL injection possible if auth_username_chars is configured empty | 8.2 | 0.0040 |  |
| [CVE-2026-27856](https://patchblox.com/security/data/cve/CVE-2026-27856.md) | Routine | dovecot23: Doveadm credentials were not checked using timing-safe checking function (bsc#1260899). | 5.9 | 0.0040 |  |
| [CVE-2026-27859](https://patchblox.com/security/data/cve/CVE-2026-27859.md) | Routine | dovecot23: excessive RFC 2231 MIME parameters in email would can excessive CPU usage (bsc#1260897). | 5.3 | 0.0038 |  |
| [CVE-2026-27855](https://patchblox.com/security/data/cve/CVE-2026-27855.md) | Routine | dovecot23: OTP driver vulnerable to replay attack (bsc#1260900). | 5.9 | 0.0032 |  |
| [CVE-2026-27860](https://patchblox.com/security/data/cve/CVE-2026-27860.md) | Routine | dovecot24: LDAP query injection possible if auth_username_chars is configured empty | 5.3 | 0.0030 |  |
| [CVE-2025-59031](https://patchblox.com/security/data/cve/CVE-2025-59031.md) | Routine | dovecot23: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing | 4.3 | 0.0029 |  |

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Data as of 2026-11-11T01:43:54Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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