Debian/dovecot: high 7.5
Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory. Attacker can force managesieve-login to be unavailable by repeatedly
Action: Upgrade dovecot to 1:2.4.1+dfsg1-6+deb13u4 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:2.4.1+dfsg1-6+deb13u4 | - |
Fixed versions
| 1:2.4.1+dfsg1-6+deb13u4 |
Sources
- osv: DEBIAN-CVE-2026-27858#Debian:13/dovecot
- https://security-tracker.debian.org/tracker/CVE-2026-27858
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