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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-27858

Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory.

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Status
Published
Published
Updated
Assigning organization
OX

Description

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 crashing the process. Protect access to managesieve protocol, or install fixed version. No publicly available exploits are known.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Open-Xchange GmbH OX Dovecot Pro

Default version status: unaffected

  • 0 to ≤ 2.3.0affected
  • 0 to ≤ 3.1.0affected
  • 0 to ≤ 2.4.0affected

References