CVE-2026-77798: Velociraptor Authenticated Denial of Service

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-24 · updated 2026-09-24
Weakness: CWE-833

Description

Velociraptor contains a deadlock condition that may be triggered by authenticated users. The issue stems from a lock management bug in the user management module.

Affected products

Rapid7 Velociraptor: before 0.77.2 — fixed in 0.77.2

How to fix

Upgrade to a fixed version: Rapid7 Velociraptor 0.77.2. Check the vendor advisory for mitigations.

References

http://docs.velociraptor.app/announcements/advisories/cve-2026-7798/
https://github.com/Velocidex/velociraptor/commit/b64d915422da2e8366781bea2b5c5e6808df829c

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