CVE-2026-3590

The record

Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent requests.. Mattermost Advisory ID: MMSA-2026-00624

Affected packages

Related vulnerabilities

• CVE-2026-53613 util-linux is a random collection of Linux utilities. CWE-367
• CVE-2026-53612 util-linux is a random collection of Linux utilities. CWE-367
• CVE-2026-67693 An issue in gnutls v.3.8.13 allows an attacker to obtain sensitive information via… CWE-367
• CVE-2026-106451 yawkat LZ4 Java provides LZ4 compression for Java. CWE-367
• CVE-2026-86805 A time-of-check to time-of-use (TOCTOU) race condition in the dynamic loader (ld.so) of… CWE-367
• CVE-2026-68488 A Time-of-check Time-of-use (TOCTOU) race condition leading to insecure symlink following… CWE-367
• CVE-2026-87554 Race condition in Chromoting in Google Chrome on on Windows prior to 153.0.8010.36… CWE-367
• CVE-2026-87523 Race condition in DataTransfer in Google Chrome prior to 153.0.8010.36 allowed a remote… CWE-367