Vulnerability · Published Jul 14, 2026 · Assigned by mitre
CVE-2026-62642
Medium 4.3
In plain English
A medium-severity infinite loop in Webmail from Roundcube. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 79.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in the TNEF decoder, which may lead to denial of service upon opening an email with a TNEF attachment.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u10 | DEBIAN-CVE-2026-62642 |
| Debian:13 | roundcube | 1.6.17+dfsg-0+deb13u1 | DEBIAN-CVE-2026-62642 |
| Debian:14 | roundcube | 1.6.17+dfsg-1 | DEBIAN-CVE-2026-62642 |
| Ubuntu:26.10 | roundcube | no fix listed | UBUNTU-CVE-2026-62642 |
Affected products (as reported)
Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.2
- https://github.com/roundcube/roundcubemail/commit/877269c79359d959a94f13c9070cab0f3389c193
- https://github.com/roundcube/roundcubemail/commit/fb952956c6eaf29e963f1a718d028d66e7957ce0
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.17
- https://github.com/roundcube/roundcubemail/commit/a007321346380136b3de2bd75b486b04f63c0d38
- https://github.com/roundcube/roundcubemail/commit/132ac8dd5a55c8466be12de1daf84355697ffa89