Skip to content
fr Sign in
3.1 Low

CVE-2026-52681 Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the…

Description

Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed, allowing sustained CPU consumption, and the leftover files increase disk consumption. Both can cause degradation of service for mail delivery. Monitor system for abnormal CPU usage and disk consumption. Update to non-vulnerable version. No publicly available exploits are known.

Affected products and versions

Product Affected versions Fixed in
OX Dovecot Pro 3.1 3.1.0 → < 3.1.6 3.1.6
OX Dovecot Pro 3.0 3.0.0 → < 3.0.7 3.0.7
OX Dovecot Pro 2.3 2.3.15 → < 2.3.22.2 2.3.22.2
OX Dovecot CE 2.3 2.3.15 → < 2.4.5 2.4.5

References

Timeline

  1. Published
  2. Last modified

Other CVEs of OX Dovecot Pro

The 44 CVEs of OX Dovecot Pro →
CVE-2026-73209 An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust… 6.5 Medium CVE-2026-73208 An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token… 7.4 High CVE-2026-52687 An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression… 6.5 Medium CVE-2026-42395 A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login… 4.3 Medium
Track this CVE