What is CVE-2026-77797?

CVE-2026-77797 is a low-severity vulnerability in Rapid7 Velociraptor, classified under Improper Input Validation. CVSS score: 3.6/10. Published 2026-09-24.

How severe is CVE-2026-77797?

Low severity. CVSS v3 base score is 3.6 out of 10.

Out-of-bounds Read in Rapid7 Velociraptor

CVE-2026-77797

Velociraptor's prefetch library contains an out of bound vulnerability which may cause a crash when parsing certain malformed prefetch files.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-09-24 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 3.6 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Rapid7 Velociraptor

Weakness classification (CWE)

CWE-20 — Improper Input Validation
CWE-125 — Out-of-bounds Read

References

docs.velociraptor.app/announcements/advisories/cve-2026-7797/
github.com/Velocidex/go-prefetch/commit/4bae9796298011598d577b125e0b3db3ee03eb74

Frequently asked questions

What is CVE-2026-77797?: CVE-2026-77797 is a low-severity vulnerability in Rapid7 Velociraptor, classified under Improper Input Validation. CVSS score: 3.6/10. Published 2026-09-24.
How severe is CVE-2026-77797?: Low severity. CVSS v3 base score is 3.6 out of 10.