Servers and applications
CVE-2019-10691
The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
- Severity
- High 7.5
- Published
- 24 Apr 2019
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Fixed in
- 2.3.5.2
- Exploit chance
- 2.8% in the next 30 daysHigher than 86% of CVEs. EPSS by FIRST, 10 Nov 2026
- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
DovecotServers and applications · cpe:a:dovecot:dovecot |
|