Vulnerability · Published May 4, 2026 · Assigned by AMZN

CVE-2026-7791Local Privilege Escalation via TOCTOU Race Condition in Amazon WorkSpaces Skylight Agent

High 7.8

In plain English

A high-severity security flaw in Workspaces from Amazon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.1%top 96.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Amazon	Workspaces	0 – before 2.6.2034.0

Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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