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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.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Element Element-hq
Products
Element Element-web
CVE-2026-55850

Element Web: A malicious homeserver can inject HTML in Element Web using its homepage

Element Web is a Matrix web client built using the Matrix React SDK. Prior to 1.12.22, EmbeddedPage in apps/web/src/components/structures/EmbeddedPage.tsx renders homeserver-supplied homepage content through dangerouslySetInnerHTML without passing it through sanitizedHtmlNode. A malicious homeserver can provide crafted HTML that Element Web renders on the homepage; the content security policy prevents JavaScript but not phishing HTML. This issue is fixed in version 1.12.22.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Element-hq
Products
Element-web