PT-2026-20391 · Graylog · Graylog

Published 2026-02-18 · Updated 2026-02-18 · CVE-2026-1435

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Graylog versions prior to 2.2.3

Description The Graylog Web Interface has a flaw related to session handling. Specifically, session identifiers are not properly invalidated after a user logs in, leading to the generation of new session IDs while old ones remain valid. This allows a compromised or leaked session ID to be reused for unauthorized access to the application and its API, potentially compromising account integrity. An attacker with network access to the web service/API network (port 9000 or HTTP/S endpoint of the server) could exploit this issue.

Recommendations Update to a version of Graylog Web Interface later than 2.2.3.

Fix

Insufficient Session Expiration

Weakness Enumeration

CWE-613

Related Identifiers

CVE-2026-1435

Affected Products

Graylog

References · 6

• https://incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog · Patch
• https://osv.dev/vulnerability/CVE-2026-1435 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1435 · Security Note
• https://twitter.com/0dayPublishing/status/2024120473781510612 · Twitter Post
• https://twitter.com/CVEnew/status/2024123167548076288 · Twitter Post
• https://twitter.com/TheHackerWire/status/2024218176494719230 · Twitter Post