Resource exhaustion in Roundcube Webmail
CVE-2026-62641
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the TNEF decoder was subject to denial of service via a crafted compressed-RTF size.
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 (39.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.5% 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/6d1004fd3764a9606c53130b322c0f295c38b… (Patch)
- github.com/roundcube/roundcubemail/commit/bf253c72d4293c93fda511b8464fe9cb34b52… (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-2026-62641?
- CVE-2026-62641 is a medium-severity vulnerability in Roundcube Webmail, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-07-14.
- How severe is CVE-2026-62641?
- Medium severity. CVSS v3 base score is 4.3 out of 10.