What is CVE-2025-12779?

CVE-2025-12779 is a high-severity vulnerability in Amazon Workspaces, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 8.8/10. Published 2025-11-05.

How severe is CVE-2025-12779?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Amazon Workspaces

CVE-2025-12779

Improper handling of the authentication token in the Amazon WorkSpaces client for Linux, versions 2023.0 through 2024.8, may expose the authentication token for DCV-based WorkSpaces to other local users on the same client machine. Under certain circumstances, a local user may be able to extract another local user's authentication token from the shared client machine and access their WorkSpace. To mitigate this issue, users should upgrade to the Amazon WorkSpaces client for Linux version 2025.0 or later.

EPSS: 0.002 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Amazon Workspaces — versions 2025.0

Weakness classification (CWE)

CWE-497 — Exposure of Sensitive System Information to an Unauthorized Control Sphere

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)

Frequently asked questions

What is CVE-2025-12779?: CVE-2025-12779 is a high-severity vulnerability in Amazon Workspaces, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 8.8/10. Published 2025-11-05.
How severe is CVE-2025-12779?: High severity. CVSS v3 base score is 8.8 out of 10.