7.5
High
CVE-2026-27858 Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large…
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| OX Dovecot Pro 3.1 | earliest → 3.1.0 | No fix stated |
| OX Dovecot Pro 2.4 | earliest → 2.4.0 | No fix stated |
| OX Dovecot Pro 2.3 | earliest → 2.3.0 | No fix stated |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Versions not published | |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Versions not published | |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 10) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 8) | Versions not published | |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Versions not published |
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References
- documentation.open-xchange.com documentation.open-xchange.com
Timeline
- Published
- Last modified
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