CVE-2026-45677
Unauthenticated LogoutRequest bypass can terminate SAML sessions in Rocket.Chat.
Is CVE-2026-45677 being exploited?
Not confirmed. CVE-2026-45677 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 0.68% probability of exploitation in the next 30 days.
How severe is CVE-2026-45677?
CVE-2026-45677 is rated High with a CVSS score of 8.7. 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-2026-45677?
Yes. A fix has been recorded for CVE-2026-45677. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45677 affect?
CVE-2026-45677 affects Rocket.Chat pre-8.5.0 (all affected pre-patch builds), Versions 8.x prior to fixes (8.0.x–8.4.x) and 7.x prior to 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-2026-45677?
Upgrade to patched release (8.5.0+ or latest fixed 8.x/7.x).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remotely destroy user sessions via unsigned SAML LogoutRequest; potential DoS for SAML users.
Immediate action required
- 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.