Vulnerability in Roundcube Webmail
CVE-2026-62642
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Roundcube Webmail — versions 1.6.0, 1.7.0
Weakness classification (CWE)
References
- github.com/roundcube/roundcubemail/commit/132ac8dd5a55c8466be12de1daf84355697ff… (Patch)
- github.com/roundcube/roundcubemail/commit/877269c79359d959a94f13c9070cab0f3389c… (Patch)
- github.com/roundcube/roundcubemail/commit/a007321346380136b3de2bd75b486b04f63c0… (Patch)
- github.com/roundcube/roundcubemail/commit/fb952956c6eaf29e963f1a718d028d66e7957… (Patch)
- github.com/roundcube/roundcubemail/releases/tag/1.6.17 (Release Notes)
- github.com/roundcube/roundcubemail/releases/tag/1.7.2 (Release Notes)
- roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-62642?
- CVE-2026-62642 is a medium-severity vulnerability in Roundcube Webmail, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 4.3/10. Published 2026-07-14.
- How severe is CVE-2026-62642?
- Medium severity. CVSS v3 base score is 4.3 out of 10.