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Vulnerability record · CVE-2026-18972 · published 11 August 2026

CVE-2026-18972: Authentication bypass by spoofing vulnerability

An authenticated attacker can spoof another GUI user's identity by sending their request with the custom header \"Grpc-Metadata-USER\". This can lead to an account takeover attack from a user with low privileges to administrator.

9.6 CVSS 3.1 Critical EPSS 0.35% · top 74.0% CWE-290 · Authentication bypass by spoofing Awaiting Analysis
9.6CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
28 Aug 2026Last modified by NVD

Description

An authenticated attacker can spoof another GUI user's identity by sending their request with the custom header \"Grpc-Metadata-USER\". This can lead to an account takeover attack from a user with low privileges to administrator.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References

LinkTags
http://docs.velociraptor.app/announcements/advisories/cve-2026-18972/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-18972), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.