CVE-2026-119407
highElement Web and Element Desktop before 1.12.32 accept guest credentials from URL fragment parameters in loadSession, allowing remote unauthenticated attackers…
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://abraxaslabs.tech/research/element-fragment-guest disclosure@vulncheck.com
- https://github.com/element-hq/element-web disclosure@vulncheck.com
- https://github.com/element-hq/element-web/blob/v1.12.31/apps/web/src/Lifecycle.ts#L188 disclosure@vulncheck.com
- https://github.com/element-hq/element-web/commit/792453c88a399d570599f5d73b08b40157cd80c0 disclosure@vulncheck.com
- https://github.com/element-hq/element-web/releases/tag/v1.12.32 disclosure@vulncheck.com
- https://github.com/element-hq/element-web/security/advisories/GHSA-c88w-7h6p-27xr disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/element-web-and-element-desktop-before-1.12.32-forced... disclosure@vulncheck.com