---
id: CVE-2026-95624
title: >-
  The Tauri updater plugin's 'check' IPC command accepts an allowDowngrades
  boolean parameter directly from frontend JavaScript code
summary: >-
  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
  diffe…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-284
vendor: Tauri
product: tauri-plugin-updater
affected:
  - tauri-plugin-updater >= 2.8.0 < 2.12.0
published: '2026-09-22'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:17:13.343'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-95624'
references:
  - url: >-
      https://github.com/tauri-apps/plugins-workspace/commit/1308bfa399b962b3977c767100a6339d1cbfdd20
    label: reefs@jfrog.com
  - url: >-
      https://github.com/tauri-apps/plugins-workspace/releases/tag/updater-v2.12.0
    label: reefs@jfrog.com
  - url: 'https://github.com/tauri-apps/tauri'
    label: reefs@jfrog.com
  - url: >-
      https://github.com/tauri-apps/tauri/security/advisories/GHSA-rjc6-5hfg-grp9
    label: reefs@jfrog.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-22T19:30:03.565802Z'
ingestedAt: '2026-09-22T18:08:12.499Z'
epss: 0.00449
epssPercentile: 0.36346
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.