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CVE-2026-27851

high CVSS 7.4 EPSS 0.4%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-27851 applies to, and the release that fixes it where the sources name one.

Dovecot 2.2.36

At a glance

Severity
High
CVSS base score
7.4 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.4% probability of exploitation in the next 30 days, higher than 35% of scored vulnerabilities
Weakness
CWE-235
Published
2026-05-12
NVD CVE.org Advisory record

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