CVE-2026-95624: CWE-284: Improper Access Control in Tauri tauri-plugin-updater
The Tauri updater plugin's 'check' IPC command accepts an allowDowngrades boolean parameter directly from frontend JavaScript code. When set to true, it replaces the version comparator from "update must be newer" to "update must be different." Because the default permission set grants allow-check to the webview, any XSS in the app frontend can invoke this command and bypass the only anti-rollback protection the updater offers. Combined with another bug, this enables downgrade attacks without even needing to fake a higher version number.
CVE-2026-95624: CWE-284: Improper Access Control in Tauri tauri-plugin-updater
Description
The Tauri updater plugin's 'check' IPC command accepts an allowDowngrades boolean parameter directly from frontend JavaScript code. When set to true, it replaces the version comparator from "update must be newer" to "update must be different." Because the default permission set grants allow-check to the webview, any XSS in the app frontend can invoke this command and bypass the only anti-rollback protection the updater offers. Combined with another bug, this enables downgrade attacks without even needing to fake a higher version number.
CVSS v3.1
Score 6.8medium
Affected software
Tauri
tauri-plugin-updater
pkg:cargo/tauri-plugin-updaterRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JFROG
- Date Reserved
- 2026-09-22T10:38:03.883Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab2bbe3f7a7c5410682baaa
Added to database: 09/22/2026, 17:33:23 UTC
Last updated: 09/22/2026, 17:33:23 UTC
Views: 1
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