What’s Vulnerable › Vulnerabilities

CVE-2026-77797: Velociraptor Prefetch parser out of bounds

• Severity: low (CVSS 3.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% 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-20

Description

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

Affected products

• Rapid7 Velociraptor: before 0.77.3 — fixed in 0.77.3

How to fix

Upgrade to a fixed version: Rapid7 Velociraptor 0.77.3. Check the vendor advisory for mitigations.

References

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

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