Is there a public exploit for CVE-2026-45689?

No public exploit for CVE-2026-45689 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-45689?

CVE-2026-45689 scores CVSS 9.1 (v3.1), rated critical. EPSS puts the chance of exploitation in the next 30 days at 0.53%.

What does CVE-2026-45689 affect?

CVE-2026-45689 affects RocketChat Rocket.Chat.

9.1 Critical

Rocket.Chat is an open-source, secure, fully customizable communications platform.

CVE-2026-45689

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 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, an unauthenticated network attacker obtains a valid Rocket.Chat OAuth access token for an arbitrary user by sending a single HTTP POST with MongoDB query operators to /oauth/token. The Rocket.Chat OAuth2 server does not validate that grant parameters are strings before forwarding them to findOne({...}) against the oauthapps and oauthaccesstokens collections, so an attacker substitutes {"$ne": null} for clientid, clientsecret, and refreshtoken and receives a freshly minted {accesstoken, refreshtoken} pair bound to whichever user's refresh token Mongo returned first. The resulting access token is a first-class bearer credential against the full /api/v1/ surface as that user. By iterating with $nin / $regex operators the attacker walks the entire oauthaccesstokens collection, collecting one fresh access token per user per request. If any matched token belongs to an admin, the stolen bearer gives full admin API access (including Apps-Engine app installation, i.e. server-side code execution). No account, credentials, userId, or prior…

Assessment

CVSS: 9.1 (v3.1)
Severity: Critical
EPSS: 0.53% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 24 June 2026
Last updated: 3 November 2026
Affected: RocketChat · Rocket.Chat
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

At the source

EUVD (ENISA)

References

https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-8p25-fm45-pjrw

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