CVE-2026-27851

Published May 12, 2026 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using safe filter until on fixed version. No publicly available exploits are known.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DSA Debian DSA DSA-6313-1 dovecot security update
Ubuntu USN Ubuntu USN USN-8365-1 Dovecot vulnerabilities
History
Type Values Removed Values Added
Title Insecure Safe Filter in Open‑Xchange OX Dovecot Pro Enabling Injection Attacks
Type Values Removed Values Added
First Time appeared Dovecot
Dovecot dovecot
Open-xchange dovecot
CPEs cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:*
Vendors & Products Dovecot
Dovecot dovecot
Open-xchange dovecot
Type Values Removed Values Added
Title Insecure Safe Filter in Open‑Xchange OX Dovecot Pro Enabling Injection Attacks
First Time appeared Open-xchange
Open-xchange ox Dovecot Pro
Vendors & Products Open-xchange
Open-xchange ox Dovecot Pro
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using safe filter until on fixed version. No publicly available exploits are known.
Weaknesses CWE-235
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
OX
Published
Updated
Jul 15, 2026, 1:12 AM
Reserved
Feb 24, 2026, 8:46 AM
Status
Modified
Published
May 12, 2026, 2:16 PM
Modified
Oct 26, 2026, 6:10 PM