CVE-2026-62644
Roundcube Webmail Password Plugin Username Spoofing Vulnerability
Description
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.
INFO
Published Date :
July 14, 2026, 4:17 p.m.
Last Modified :
July 20, 2026, 12:41 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 | CRITICAL | [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-2026-62644 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-2026-62644.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62644 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-2026-62644
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-2026-62644 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62644 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:N/S:U/C:H/I:H/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/5cdc6a48b40beabff7f0bf5d9035f4491e877e4c Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/7414fef51cd2407d39faab99680763f10ed5231d Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/83150ce04d689a70f92d511bcae40adba8d55476 Types: Patch Added Reference Type MITRE: https://github.com/roundcube/roundcubemail/commit/9a96c20d8c7c9135876b68bebd6960af3ee60923 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-2026-62644', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-14T17:13:58.999753Z'} -
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, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N Added CWE CWE-290 Added Reference https://github.com/roundcube/roundcubemail/commit/5cdc6a48b40beabff7f0bf5d9035f4491e877e4c Added Reference https://github.com/roundcube/roundcubemail/commit/7414fef51cd2407d39faab99680763f10ed5231d Added Reference https://github.com/roundcube/roundcubemail/commit/83150ce04d689a70f92d511bcae40adba8d55476 Added Reference https://github.com/roundcube/roundcubemail/commit/9a96c20d8c7c9135876b68bebd6960af3ee60923 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