Graylog
CVE-2026-1435
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Improper session invalidation in Graylog Web Interface 2.2.3 allows attackers to maintain access through expired sessions, potentially enabling persistent unauthorized access to log management systems.
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Graylog Web Interface version 2.2.3 with HTTP/S endpoint (port 9000) accessible over network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 9.8. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Attacker obtains a session token (via XSS, sniffing, etc.), continues to use it after the session should have expired, maintaining persistent access to log data. |
| Remediation | Update Graylog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Immediately inventory all Graylog deployments and confirm version 2.2.3 usage; restrict Graylog web interface access to trusted networks only via firewall/VPN. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Graylog is a free and open log management platform. In versions 6.2.0 to before 6.2.4 and 6.3.0-alpha.1 to before 6.3.0-
Graylog is a free and open log management platform. Rated high severity (CVSS 8.0), this vulnerability is remotely explo
Graylog is a free and open log management platform. Rated medium severity (CVSS 6.5), this vulnerability is remotely exp
Graylog 2.2.3 contains an insecure direct object reference (IDOR) vulnerability in its user API endpoint that allows aut
Reflected XSS in Graylog 2.2.3's web interface allows remote attackers to execute arbitrary JavaScript in a victim's bro
Graylog Web Interface 2.2.3 contains a reflected XSS vulnerability in the /system/index_sets/ endpoint where unsanitized
Reflected XSS in Graylog Web Interface version 2.2.3 fails to properly sanitize user-supplied input in the /system/pipel
Graylog Web Interface 2.2.3 contains a reflected XSS vulnerability in the /alerts/ endpoint where unencoded URL paramete
Graylog Web Interface 2.2.3 contains a reflected XSS vulnerability in the /system/nodes/ endpoint where unescaped URL pa
Same weakness CWE-613 – Insufficient Session Expiration
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today