Affects widely used Rocket.Chat; token abuse enables full admin access and RCE.
CVE-2026-45689
Unauthenticated token forgery enables admin API access and RCE in Rocket.Chat.
Is CVE-2026-45689 being exploited?
Not confirmed. CVE-2026-45689 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.53% probability of exploitation in the next 30 days.
How severe is CVE-2026-45689?
CVE-2026-45689 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-45689?
Yes. A fix has been recorded for CVE-2026-45689. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45689 affect?
CVE-2026-45689 affects Rocket.Chat server (self-hosted) versions before 8.5.0: 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, 7.10.11. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45689?
Upgrade to patched versions (≥8.5.0) immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via admin API access; unauthenticated token theft allows bearer with admin-level control and server-side code execution.
Patch when possible
- affected>= 8.5.0-rc.0 and < 8.5.0
- affected>= 8.4.0-rc.0 and < 8.4.1
- affected>= 8.3.0-rc.0 and < 8.3.3
- affected>= 8.2.0-rc.0 and < 8.2.3
- affected>= 8.1.0-rc.0 and < 8.1.4
- affected>= 8.0.0-rc.0 and < 8.0.5
- affected>= 7.11.0-rc.0 and < 7.13.7
- affected< 7.10.11
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.