NVD security advisory
Security advisory for Element Web and Element Desktop
CVE-2026-119407
Full advisory details, affected packages, severity context, and original source.
Affected technology
Element Web and Element DesktopAffected product
Advisory overview
Element Web and Element Desktop before 1.12.32 accept guest credentials from URL fragment parameters in loadSession, allowing remote unauthenticated attackers to log out users and clear local stores. Attackers can lure logged-in users into opening links with guest_user_id and guest_access_token to force an attacker-controlled guest session and destroy unbacked end-to-end encryption keys.
Related references
- https://abraxaslabs.tech/research/element-fragment-guest
- https://github.com/element-hq/element-web
- https://github.com/element-hq/element-web/blob/v1.12.31/apps/web/src/Lifecycle.ts#L188
- https://github.com/element-hq/element-web/commit/792453c88a399d570599f5d73b08b40157cd80c0
- https://github.com/element-hq/element-web/releases/tag/v1.12.32
- https://github.com/element-hq/element-web/security/advisories/GHSA-c88w-7h6p-27xr
- https://www.vulncheck.com/advisories/element-web-and-element-desktop-before-1.12.32-forced-logout-via-guest-credential-url-parameters