CVE-2026-1435

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:graylog:graylog:2.2.3:*:*:*:*:*:*:*

History

18 Feb 2026, 20:22

Type	Values Removed	Values Added
First Time		Graylog Graylog graylog
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
References	~~() https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog -~~	() https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog - Third Party Advisory
CPE		cpe:2.3:a:graylog:graylog:2.2.3:::::::*

18 Feb 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-18 14:16

Updated : 2026-02-18 20:22

NVD link : CVE-2026-1435

Mitre link : CVE-2026-1435

CVE.ORG link : CVE-2026-1435

JSON object : View

Products Affected

graylog

graylog

CWE

CWE-613

Insufficient Session Expiration

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