GHSA-JXX9-PX88-PJ69 n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete

Summary When ENABLEMULTITENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that omitted those headers — or supplied only one of them — silently fell back to the process-level N8NAPIURL / N8NAPIKEY credentials...

GHSA-5R97-79VW-QVM4

creationtimestamp| type| source ---|---|--- 2026-05-18 16:10:50+00:00| seen| https://gist.github.com/alon710/437f2e5c2f0622a4f1f7e66c52bc342f...

MINI-VX72-5MMW-P9PX

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NPM: webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins

NPM: webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins vulnerability discovered by ? in WordPress Npm webpack-dev-server versions = 5.2.3...

EUVD-2026-29404

webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins...

CLEANSTART-2026-UO66475 Security fixes for CVE-2026-42304, CVE-2026-44307, ghsa-2h4p-vjrc-8xpq, ghsa-grgv-6hw6-v9g4 applied in versions: 5.4.6-r0

Multiple security vulnerabilities affect the py3-jupyterhub package. These issues are resolved in later releases. See references for individual vulnerability details...

NPM: n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters

NPM: n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters vulnerability discovered by ? in WordPress Npm n8n-mcp versions 2.51.3...

CLEANSTART-2026-ZI38454 Security fixes for CVE-2026-44431, CVE-2026-44432, CVE-2026-6357, ghsa-jp4c-xjxw-mgf9, ghsa-mf9v-mfxr-j63j, ghsa-qccp-gfcp-xxvc applied in versions: 25.11.0.1-r1

Multiple security vulnerabilities affect the miniforge3 package. These issues are resolved in later releases. See references for individual vulnerability details...

SUSE-SU-2026:21777-1 Security update for the Linux Kernel RT (Live Patch 5 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.26.1 fixes one security issue The following security issue was fixed: - CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags bsc1264459...

RHSA-2026:18025 Red Hat Security Advisory: kpatch-patch-5_14_0-570_17_1, kpatch-patch-5_14_0-570_39_1, kpatch-patch-5_14_0-570_66_1, and kpatch-patch-5_14_0-570_94_1 security update

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Mattermost doesn't sanitize sensitive configuration fields in the Mattermost Calls plugin

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 fail to sanitize sensitive configuration fields in the Mattermost Calls plugin which allows an attacker with access to a support packet to obtain TURN server credentials via the plaintext values present in the exported plugi...

Mattermost doesn't escape some variables that could contain malicious content during error page composition

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to escape some variables that could contain malicious content during error page composition which allows an attacker with access to edit some site configuration to execute some malicious code via injecting some JS as part of those...

CVE-2026-5163

Mattermost 11.5.x prior to 11.5.2 (up to 11.5.1 affected) fails to verify channel membership when processing AI-assisted message rewrites, allowing an authenticated user to read content from threads in private channels and direct messages they should not access via a crafted request to the post r...

EUVD-2026-30753

Mattermost versions 11.5.x = 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite...

CVE-2026-5163 Missing authorization check in AI message rewrite endpoint allows access to private thread content

Mattermost versions 11.5.x = 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite...

CVE-2026-4286

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to check if teamid was being changed when updating playbooks, allowing users with only Manage Playbook Configurations permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID:...

CVE-2026-4286 Playbooks Plugin fails to validate team transfers, allowing unauthorized removal of member access via playbook update

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to check if teamid was being changed when updating playbooks, allowing users with only Manage Playbook Configurations permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID:...

EUVD-2026-30746

Mattermost Plugins versions =11.5 11.1.5 10.13.11 11.3.4.0 fail to have API-level checks on which groups the user can create issues or attach comments to which allows a user that is member of multiple groups to create issues to a locked group via direct API requests. Mattermost Advisory ID:...

CVE-2026-6342 Group prefix matching bypass for subscriptions

Mattermost Plugins versions =11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via creating groups that share the same prefix as a whitelisted group. Mattermost Advisory ID:...

CVE-2026-6334

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to redeem authorization codes issued to a different client via a crafted token exchange request.. Mattermo...