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CVE-2026-27851

Published: May 12, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-235
7.4HIGH
NVD MITRE
EPSS Score
0.4%
Top 66.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-235CWE-89

Affected Products

dovecot
oss-projectaka pigeonhole
dovecotOn-premWeb App
Communications / email-server-client
open-xchange
commercial·DEaka open-xchange gmbh, ox
dovecot
Communications
Open-Xchange GmbH
commercial·DEaka open-xchange
OX Dovecot Pro
Communications

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0002.json
documentation.open-xchange.com
https://access.redhat.com/security/cve/CVE-2026-27851
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2476471
bugzilla.redhat.com
and 1 more references View all →

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