CVE-2026-103009

Authorization Bypass Through User-Controlled Key CWE-639 in Elasticsearch can lead to Information Disclosure via a specially crafted cross-cluster search request that references an unauthorized shard identifier. Elasticsearch contains an authorization bypass weakness in its handling of...

CVE-2026-103009

Elasticsearch contains an authorization bypass weakness (CWE-639) within the Remote Cluster Security (RCS) 2.0 model during cross-cluster search requests. The flaw exists because the system validates a request against one identifying attribute while using a separate, independently-supplied attrib...

EUVD-2026-93939

Authorization Bypass Through User-Controlled Key CWE-639 in Elasticsearch can lead to Information Disclosure via a specially crafted cross-cluster search request that references an unauthorized shard identifier. Elasticsearch contains an authorization bypass weakness in its handling of...

CVE-2026-103009 Authorization Bypass Through User-Controlled Key in Elasticsearch Leading to Information Disclosure

Authorization Bypass Through User-Controlled Key CWE-639 in Elasticsearch can lead to Information Disclosure via a specially crafted cross-cluster search request that references an unauthorized shard identifier. Elasticsearch contains an authorization bypass weakness in its handling of...

Elasticsearch 8.19.23, 9.4.8, 9.5.5 Security Update (ESA-2026-199)

Authorization Bypass Through User-Controlled Key in Elasticsearch Leading to Information Disclosure Authorization Bypass Through User-Controlled Key CWE-639 in Elasticsearch can lead to Information Disclosure via a specially crafted cross-cluster search request that references an unauthorized sha...

SUSE CVE-2026-7184

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the managesecureconnections permission to obtain remote cluster authentication tokens via a PATCH request to the...

GO-2026-6282 Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations in github.com/mattermost/mattermost-server

Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations in github.com/mattermost/mattermost-server...

PT-2026-82031

Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations in github.com/mattermost/mattermost-server...

CVE-2026-66788 Lighthouse: dockerfile build stages use end-of-life fedora 40 referenced by mutable tag

A flaw was found in Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized...

SUSE CVE-2026-4273

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate that the RefreshedToken differs from the original invite token during remote cluster invite confirmation which allows an authenticated attacker to bypass token rotation and reuse the original invite token via sending a craft...

SUSE CVE-2026-4274

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization in the /share-channel autocomplete handler due to missing permission checks for managesharedchannels. An attacker can access remote cluster connection metadata by issuing autocomplete requests without the required...

CVE-2026-9824

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...

EUVD-2026-43339

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...

CVE-2026-9824

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...

CVE-2026-9824

Mattermost v11.7.x ≤ 11.7.2, v11.6.x ≤ 11.6.4, and v10.11.x ≤ 10.11.19 are affected by CVE-2026-9824 due to a missing check of the manage_shared_channels permission in the /share-channel autocomplete handler. This allows an authenticated user without that permission to enumerate remote cluster co...

CVE-2026-9824 Remote cluster metadata enumeration via /share-channel autocomplete

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...

CVE-2026-9824 Remote cluster metadata enumeration via /share-channel autocomplete

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...

CVE-2026-9824 Remote cluster metadata enumeration via /share-channel autocomplete

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...

CVE-2026-10103

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to verify post ownership in the shared channel inbound sync handler, which allows an authenticated remote cluster to modify or delete posts authored by local users or other remotes via crafted sync messages referencing...