CVE-2026-42006 – Proxmox IMAP Memory Consumption Vulnerability (Arbitrary Bracing)

CVE ID :CVE-2026-42006

Published : May 12, 2026, 2:17 p.m. | 41 minutes ago

Description :An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you could still use open braces to bypass the limit. Using excessive bracing, attacker can cause memory usage up to configured memory limit. Install fixed version, or configure vsz_limit for imap process to low value. No publicly available exploits are known.

Severity: 4.3 | MEDIUM

Visit the link for more details, such as CVSS details, affected products, timeline, and more…