CVE-2026-58066
Rocket.Chat SAML SSO XML Signature Wrapping Vulnerability
Description
Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user.
INFO
Published Date :
July 30, 2026, 6:25 a.m.
Last Modified :
July 30, 2026, 6:25 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-58066
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | CRITICAL | [email protected] |
Solution
- Update to a patched Rocket.Chat version.
- Ensure SAML SSO is correctly configured.
- Review authentication logs for suspicious activity.
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-2026-58066.
| URL | Resource |
|---|---|
| https://github.com/RocketChat/Rocket.Chat/pull/41233 | |
| https://hackerone.com/reports/3827674 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-58066 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-2026-58066
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-58066 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-58066 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.
-
New CVE Received by [email protected]
Jul. 30, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Rocket.Chat', 'product': 'Rocket.Chat', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '8.7.0', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.6.1', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.5.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.3.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.2.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.1.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.0.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.10.14', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user. Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-287 Added Reference https://github.com/RocketChat/Rocket.Chat/pull/41233 Added Reference https://hackerone.com/reports/3827674