CVE-2026-3524

Mattermost Plugin Legal Hold versions =1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID:...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization due to a missing return statement after a permission check in the ServeHTTP function. An attacker can gain unauthorized access to, create, download, and delete sensitive legal hold data by sending crafted API...

CVE-2026-3524

CVE-2026-3524 affects Mattermost Plugin Legal Hold versions

CVE-2026-3524 Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check

Mattermost Plugin Legal Hold versions =1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID:...

CVE-2026-3524 Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check

Mattermost Plugin Legal Hold versions =1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID:...

CVE-2026-3524 Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check

Mattermost Plugin Legal Hold versions =1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID:...

Mattermost 安全漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. There is a security vulnerability in Mattermost; this vulnerability stems from the failure of authorization checks, which allows requests to continue processing without being stopped. This may allow...

PT-2026-30601

Mattermost Plugin Legal Hold versions =1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID:...

GO-2026-4916 Mattermost doesn't rate limit login requests, allowing DoS in github.com/mattermost/mattermost-server

Mattermost doesn't rate limit login requests, allowing DoS in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from...

PT-2026-29956

Mattermost doesn't rate limit login requests, allowing DoS in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from...

CVE-2026-33809 vulnerabilities

Vulnerabilities for packages: rclone, seaweedfs, mailpit-fips, ollama-fips, seaweedfs-fips, seaweedfs-operator-fips, hugo-extended, hugo-fips, hugo, mailpit, mattermost, ollama, rclone-fips, listmonk, seaweedfs-operator, mattermost-fips...

GHSA-44P7-9XX4-HF2G vulnerabilities

Vulnerabilities for packages: rclone, seaweedfs, mailpit-fips, ollama-fips, seaweedfs-fips, seaweedfs-operator-fips, hugo-extended, hugo-fips, hugo, mailpit, mattermost, ollama, rclone-fips, listmonk, seaweedfs-operator, mattermost-fips...

GHSA-44P7-9XX4-HF2G vulnerabilities

Vulnerabilities for packages: ollama, rclone, hugo-extended, hugo, seaweedfs, mattermost, mailpit...

CVE-2026-33809 vulnerabilities

Vulnerabilities for packages: ollama, rclone, hugo-extended, hugo, seaweedfs, mattermost, mailpit...

Server-side Request Forgery (SSRF)

Overview @openclaw/mattermost is an OpenClaw Mattermost channel plugin Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetch process in multiple channel extensions when outbound requests are made to configured base URLs without proper validation. An...

SUSE CVE-2026-2455

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to canonicalize IPv4-mapped IPv6 addresses before reserved IP validation which allows an attacker to perform SSRF attacks against internal services via IPv4-mapped IPv6 literals e.g., ::ffff:127.0.0.1.. Mattermost...

SUSE CVE-2026-2456

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 Mattermost fails to limit the size of responses from integration action endpoints, which allows an authenticated attacker to cause server memory exhaustion and denial of service via a malicious integration server that return...

SUSE CVE-2026-2457

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to sanitize client-supplied post metadata which allows an authenticated attacker to spoof permalink embeds impersonating other users via crafted PUT requests to the post update API endpoint.. Mattermost Advisory ID:...

SUSE CVE-2026-2458

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID:...

SUSE CVE-2026-2461

Mattermost Plugins versions =11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559...