Quick answers
- Is CVE-2026-45677 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-45677 being exploited in the wild.
- How severe is CVE-2026-45677?
- Informational severity, with a CVSS score of 8.7, published 24 June 2026.
- Which products and versions are affected?
- Rocket.Chat < 8.5.0, < 8.4.1, < 8.3.3, < 8.2.3, < 8.1.4, < 8.0.5, < 7.13.7, < 7.10.11.
- Is there a fix for CVE-2026-45677?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-45677 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-45677?
- Check whether you run Rocket.Chat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A missing authorization/signature verification vulnerability exists in Rocket.Chat's SAML Service Provider (SP) implementation. The application processes inbound SAML LogoutRequest messages without verifying their digital signatures. An unauthenticated remote attacker can craft a malicious LogoutRequest using a target's SAML NameID (often their email address) and submit it to the logout endpoint. This results in the immediate destruction of the victim's session. The attack can be automated to target all SAML-authenticated users, leading to a persistent Denial of Service (DoS). The issue is resolved in versions 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.
Affected products
- RocketChat Rocket.Chat < 8.5.0, < 8.4.1, < 8.3.3, < 8.2.3, < 8.1.4, < 8.0.5, < 7.13.7, < 7.10.11
Timeline
- 2026-05-14: advisory: GitHub Security Advisory published
- 2026-06-24: disclosed: CVE published to NVD