CVE-2026-119407

high

Description

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.

References

https://www.vulncheck.com/advisories/element-web-and-element-desktop-before-1.12.32-forced-logout-via-guest-credential-url-parameters

https://github.com/element-hq/element-web/security/advisories/GHSA-c88w-7h6p-27xr

https://github.com/element-hq/element-web/releases/tag/v1.12.32

https://github.com/element-hq/element-web/commit/792453c88a399d570599f5d73b08b40157cd80c0

https://github.com/element-hq/element-web/blob/v1.12.31/apps/web/src/Lifecycle.ts#L188

https://github.com/element-hq/element-web

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-113791

https://abraxaslabs.tech/research/element-fragment-guest

Details

Source: Mitre, NVD

Published: 2026-10-30

Updated: 2026-10-30

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:C

Severity: High

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Severity: High

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00142