CVE-2026-62642
Roundcube Webmail TNEF Decoder Denial of Service Vulnerability
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.
INFO
Published Date :
July 14, 2026, 4:17 p.m.
Last Modified :
July 20, 2026, 12:55 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Roundcube Webmail to version 1.6.17 or later.
- Update Roundcube Webmail to version 1.7.2 or later.
Public PoC/Exploit Available at Github
CVE-2026-62642 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62642.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62642 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62642
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62642 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62642 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* versions from (including) 1.7.0 up to (excluding) 1.7.2 *cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* versions from (including) 1.6.0 up to (excluding) 1.6.17 Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/132ac8dd5a55c8466be12de1daf84355697ffa89 Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/877269c79359d959a94f13c9070cab0f3389c193 Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/a007321346380136b3de2bd75b486b04f63c0d38 Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/fb952956c6eaf29e963f1a718d028d66e7957ce0 Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/releases/tag/1.6.17 Types: Release Notes Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/releases/tag/1.7.2 Types: Release Notes Added Reference Type MITRE: https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 14, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-62642', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-14T17:17:53.646785Z'} -
New CVE Received by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Roundcube', 'product': 'Webmail', 'versions': [{'status': 'affected', 'version': '1.6.0', 'lessThan': '1.6.17', 'versionType': 'semver'}, {'status': 'affected', 'version': '1.7.0', 'lessThan': '1.7.2', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Added CWE CWE-835 Added Reference https://github.com/roundcube/roundcubemail/commit/132ac8dd5a55c8466be12de1daf84355697ffa89 Added Reference https://github.com/roundcube/roundcubemail/commit/877269c79359d959a94f13c9070cab0f3389c193 Added Reference https://github.com/roundcube/roundcubemail/commit/a007321346380136b3de2bd75b486b04f63c0d38 Added Reference https://github.com/roundcube/roundcubemail/commit/fb952956c6eaf29e963f1a718d028d66e7957ce0 Added Reference https://github.com/roundcube/roundcubemail/releases/tag/1.6.17 Added Reference https://github.com/roundcube/roundcubemail/releases/tag/1.7.2 Added Reference https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2