CVE-2026-92789: Server-Side Request Forgery (SSRF)

Graylog through 7.1.4 validates outbound URLs against an allowlist before making requests but fails to re-validate after following HTTP redirects. Attackers with lookup table or event notification permissions can craft allowlisted endpoints that redirect to internal services, enabling the server ...

Improper Input Validation

Graylog is vulnerable to Improper Input Validation. The vulnerability is due to improper parsing of field-like text and escaped quotes within quoted FortiGate syslog values, which allows an unauthenticated network attacker to manipulate or overwrite security-log fields or cause messages to be...

CVE-2026-55867

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/userId/tokens/idOrToken endpoint implemented by UsersResource.revokeToken in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERSTOKENREMOVE...

CVE-2026-55841

Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/codecs/GLFortiGateSyslogEvent.java and...

Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens

Impact Graylog contains an insecure direct object reference IDOR vulnerability in the token revocation endpoint. An authenticated user can delete access tokens belonging to other users, including service account tokens and administrator tokens, if they know or can guess a valid token identifier...

GHSA-J769-9GV9-65GR Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens

Impact Graylog contains an insecure direct object reference IDOR vulnerability in the token revocation endpoint. An authenticated user can delete access tokens belonging to other users, including service account tokens and administrator tokens, if they know or can guess a valid token identifier...

CVE-2026-55867 Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/userId/tokens/idOrToken endpoint implemented by UsersResource.revokeToken in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERSTOKENREMOVE...

CVE-2026-55867 Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/userId/tokens/idOrToken endpoint implemented by UsersResource.revokeToken in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERSTOKENREMOVE...

EUVD-2026-68014

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/userId/tokens/idOrToken endpoint implemented by UsersResource.revokeToken in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERSTOKENREMOVE...

CVE-2026-55867 Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens

Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/userId/tokens/idOrToken endpoint implemented by UsersResource.revokeToken in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERSTOKENREMOVE...

CVE-2026-55867

Graylog (a log management platform) is affected in versions 6.2.0 through 6.3.12, 7.0.7, and 7.1.2 . The vulnerability resides in the DELETE /users/{userId}/tokens/{idOrToken} endpoint (UsersResource.revokeToken()), where the USERS_TOKENREMOVE permission is checked against an attacker-controlled ...

GHSA-GQR6-R77P-C2PJ Fortigate syslog message parser can be exploited to modify or delete fields from the original message

Impact A security issue has been identified in Graylog affecting the parsing of syslog messages that use a key-value format, such as those generated by Fortigate devices. The vulnerability allows attackers to overwrite individual message fields, or to produce invalid messages which Graylog will...

Fortigate syslog message parser can be exploited to modify or delete fields from the original message

Impact A security issue has been identified in Graylog affecting the parsing of syslog messages that use a key-value format, such as those generated by Fortigate devices. The vulnerability allows attackers to overwrite individual message fields, or to produce invalid messages which Graylog will...

CVE-2026-55841 Graylog: Fortigate syslog message parser can be exploited to modify or delete fields from the original message

Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/codecs/GLFortiGateSyslogEvent.java and...

CVE-2026-55841 Graylog: Fortigate syslog message parser can be exploited to modify or delete fields from the original message

Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/codecs/GLFortiGateSyslogEvent.java and...

CVE-2026-55841 Graylog: Fortigate syslog message parser can be exploited to modify or delete fields from the original message

Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/codecs/GLFortiGateSyslogEvent.java and...

CVE-2026-55841

Graylog (a free and open log management platform) is affected by a parsing flaw in its FortiGate key-value syslog parser (GLFortiGateSyslogEvent.java and SyslogCodec.java). The root cause is that KV_PATTERN and QUOTED_KV_PATTERN mishandle field-like text inside quoted values: crafted values conta...

CVE-2026-55425

Graylog is a free and open log management platform. From 7.1.0 until 7.1.4 and 7.2.0-alpha.2, the System Catalog entity titles endpoint in graylog2-server/src/main/java/org/graylog2/rest/resources/system/contentpacks/titles/EntityTitleServiceImpl.java allows an authenticated user to request...

Graylog Server: System Catalog titles endpoint can be used to retrieve values of protected database fields

Impact A vulnerability was found in Graylog's API endpoint for retrieving system catalog entity titles. Authenticated users could retrieve database fields of supported entities by sending a custom API request. These fields can include e.g. the password hash of a user but not the password itself,...

GHSA-Q79R-R9XG-R863 Graylog Server: System Catalog titles endpoint can be used to retrieve values of protected database fields

Impact A vulnerability was found in Graylog's API endpoint for retrieving system catalog entity titles. Authenticated users could retrieve database fields of supported entities by sending a custom API request. These fields can include e.g. the password hash of a user but not the password itself,...