What’s Vulnerable › Vulnerabilities

CVE-2026-62642

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-835

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 products

• Roundcube Webmail: from 1.6.0 before 1.6.17; from 1.7.0 before 1.7.2 — fixed in 1.6.17, 1.7.2

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.6.17, 1.7.2. Check the vendor advisory for mitigations.

References

• https://github.com/roundcube/roundcubemail/commit/132ac8dd5a55c8466be12de1daf84355697ffa89
• https://github.com/roundcube/roundcubemail/commit/877269c79359d959a94f13c9070cab0f3389c193
• https://github.com/roundcube/roundcubemail/commit/a007321346380136b3de2bd75b486b04f63c0d38
• https://github.com/roundcube/roundcubemail/commit/fb952956c6eaf29e963f1a718d028d66e7957ce0
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.17
• https://github.com/roundcube/roundcubemail/releases/tag/1.7.2
• https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2

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