CVE-2026-42006
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.
- Affected products
- Dovecot, Linuxmint, Red Os, Rocky Linux, Ubuntu
- Dovecot
- < 2.4.4
- Open-xchange Dovecot
- < 3.1.5
- Fix
- Available
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.6% (48th percentile)
- Weakness
- CWE-770, CWE-400
- NVD status
- Modified
- Published
- 2026-05-12
CVE-2026-42006 at NVD
No indexed exploits for CVE-2026-42006 yet
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No exploit for CVE-2026-42006 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.