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Critical · 9.3 CVE-2026-1435 EUVD-2026-7920GHSA-3crm-x896-j73p

Incorrect management of session invalidation vulnerability in Graylog Web Interface

Published Feb 18, 2026 · Updated Feb 18, 2026 · Assigned by INCIBE

Description

Not properly invalidated session vulnerability in Graylog Web Interface, version 2.2.3, due to incorrect management of session invalidation after new logins. The application generates a new 'sessionId' each time a user authenticates, but does not invalidate previously issued session identifiers, which remain valid even after multiple consecutive logins by the same user. As a result, a stolen or leaked 'sessionId' can continue to be used to authenticate valid requests. Exploiting this vulnerability would allow an attacker with access to the web service/API network (port 9000 or HTTP/S endpoint of the server) to reuse an old session token to gain unauthorized access to the application, interact with the API/web, and compromise the integrity of the affected account.

Affected products

VendorProductAffectedFixed
Graylog Graylog Web Interface 2.2.3 —

Advisories 1

References