CVE-2026-7791

Local Privilege Escalation via TOCTOU Race Condition in Amazon WorkSpaces Skylight Agent

State: Published
Severity: 8.5 High
Published: May 4, 2026
Updated: Oct 20, 2026
Reserved: May 4, 2026

Description

Improper privilege management in the log rotation mechanism of the Skylight Workspace Config Service in Amazon WorkSpaces for Windows before 2.6.2034.0 allows a local non-admin authenticated user to place arbitrary files into arbitrary locations bypassing file system permission protections, leading to local privilege escalation to SYSTEM.

Scores

CVSS	Score	Vector	Source
4.0	8.5 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	AMZN
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	AMZN

Weaknesses

CWE-367 Time-of-Check Time-of-Use (TOCTOU) Race Condition

Affected Products

Product	Versions
WorkspacesAmazon	before 2.6.2034.0Affected

References

https://aws.amazon.com/security/security-bulletins/2026-025-aws/vendor-advisory

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