CVE-2026-119407
Element Web and Element Desktop before 1.12.32 Forced Logout via Guest Credential URL Parameters
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| element-web element-hq |
≥ 0; < 1.12.32 (affected, semver) 1.12.32 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| element-desktop element-hq |
≥ 0; < 1.12.32 (affected, semver) 1.12.32 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
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 | CNA: VulnCheck |
| 3.1 / 7.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H | CNA: VulnCheck |
| 4.0 / 7.1 high |
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 7.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/element-hq/element-web/security/advisories/GHSA-c88w-7h6p-27xrCNA: VulnCheck · vendor-advisory
- https://github.com/element-hq/element-web/commit/792453c88a399d570599f5d73b08b40157cd80c0CNA: VulnCheck · patch
- https://github.com/element-hq/element-web/blob/v1.12.31/apps/web/src/Lifecycle.ts#L188CNA: VulnCheck · technical-description
- https://github.com/element-hq/element-web/releases/tag/v1.12.32CNA: VulnCheck · release-notes
- https://abraxaslabs.tech/research/element-fragment-guestCNA: VulnCheck · third-party-advisory
- https://github.com/element-hq/element-webCNA: VulnCheck · product
- https://www.vulncheck.com/advisories/element-web-and-element-desktop-before-1.12.32-forced-logout-via-guest-credential-url-parametersCNA: VulnCheck · third-party-advisory
- https://abraxaslabs.tech/research/element-fragment-guest[email protected]
- https://github.com/element-hq/element-web[email protected]
- https://github.com/element-hq/element-web/blob/v1.12.31/apps/web/src/Lifecycle.ts#L188[email protected]
- https://github.com/element-hq/element-web/commit/792453c88a399d570599f5d73b08b40157cd80c0[email protected]
- https://github.com/element-hq/element-web/releases/tag/v1.12.32[email protected]
- https://github.com/element-hq/element-web/security/advisories/GHSA-c88w-7h6p-27xr[email protected]
- https://www.vulncheck.com/advisories/element-web-and-element-desktop-before-1.12.32-forced-logout-via-guest-credential-url-parameters[email protected]
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