CVE-2026-95626: Tauri framework v2 CSP nonce protection bypass via data and blob URI schemes allows an XSS to RCE chains

Severity: high (CVSS 8.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-23 · updated 2026-09-23
Weakness: CWE-79

Description

Tauri's Content Security Policy hardening, which injects a random nonce to restrict script execution, provides zero protection when an application includes data: or blob: in its script-src directive. Per the CSP Level 3 specification, these scheme sources remain active even when a nonce is present, allowing arbitrary script execution without knowing the nonce.

Affected products

tauri-apps tauri: from 2.0.0

References

https://github.com/tauri-apps/tauri
https://github.com/tauri-apps/tauri/security/advisories/GHSA-6vxm-x265-58qf

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