CVE-2026-54397 MISP event editing allows unauthorized assignment to undisclosed sharing groups

A vulnerability in MISP’s non-REST event editing path allowed an authenticated user with event edit permissions to manipulate the submitted form data and set an event’s sharinggroupid to a sharing group they were not authorized to use. When distribution was set to sharing group distribution, the...

CVE-2026-47264

CVE-2026-47264 affects Discourse releases 2026.1.0–2026.1.3, 2026.3.0–2026.3.0x (up to 2026.3.0-latest until 2026.3.1), and 2026.4.0–2026.4.0x (up to 2026.4.0-latest until 2026.4.1). The root cause is that DetailedTagSerializer#tag_group_names returned every tag group a tag belonged to without fi...

CVE-2026-47264 Discourse: Don't leak restricted tag group names via tag info

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, DetailedTagSerializertaggroupnames returned every tag group a tag belonged to without filtering against the requesting...

EUVD-2026-36561

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, DetailedTagSerializertaggroupnames returned every tag group a tag belonged to without filtering against the requesting...

EUVD-2026-36560

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /webhookevents/ in Jobs::RedeliverWebHookEvents did not pass groupids, leaving the channel...

CVE-2026-47263

Summary: Discourse platforms affected by CVE-2026-47263 expose a channel via Webhook events due to a missing group_ids parameter in MessageBus.publish for /web_hook_events/, making the channel readable by any authenticated user (or anonymous users when login is disabled). Impact (as stated): Webh...

CVE-2026-47263 Discourse: Prevent webhook payload disclosure on event redelivery

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /webhookevents/ in Jobs::RedeliverWebHookEvents did not pass groupids, leaving the channel...

CVE-2026-47263 Discourse: Prevent webhook payload disclosure on event redelivery

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /webhookevents/ in Jobs::RedeliverWebHookEvents did not pass groupids, leaving the channel...

CVE-2026-47263 Discourse: Prevent webhook payload disclosure on event redelivery

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /webhookevents/ in Jobs::RedeliverWebHookEvents did not pass groupids, leaving the channel...

EUVD-2026-36587

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, group owners who are not necessarily admins or moderators can view a group's outgoing email/SMTP credentials in plaintext...

CVE-2026-44784 Discourse: Non-staff group owners can see email password in plaintext through group history

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, group owners who are not necessarily admins or moderators can view a group's outgoing email/SMTP credentials in plaintext...

CVE-2026-44784 Discourse: Non-staff group owners can see email password in plaintext through group history

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, group owners who are not necessarily admins or moderators can view a group's outgoing email/SMTP credentials in plaintext...

CVE-2026-44784 Discourse: Non-staff group owners can see email password in plaintext through group history

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, group owners who are not necessarily admins or moderators can view a group's outgoing email/SMTP credentials in plaintext...

CVE-2026-44784

Discourse has a vulnerability where non-staff group owners can access a group’s outgoing SMTP credentials in plaintext via the group history log (/groups/:name/logs.json). Affected fields include email_password, email_username, smtp_server, smtp_port, and smtp_ssl_mode, with SMTP password being t...

CVE-2026-44782 Discourse: GroupPostSerializer leaks hidden full names through reaction post association

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, GroupPostSerializer declared includeuserlongname? as the predicate for its :name attribute, but AMS looks for includename?...

CVE-2026-44782 Discourse: GroupPostSerializer leaks hidden full names through reaction post association

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, GroupPostSerializer declared includeuserlongname? as the predicate for its :name attribute, but AMS looks for includename?...

CVE-2026-44782

Discourse (open-source) is affected. In versions 2026.1.0-latest–2026.1.3.x, 2026.3.0-latest–2026.3.0.x, and 2026.4.0-latest–2026.4.0.x, GroupPostSerializer used include_user_long_name? as the predicate for the :name attribute. AMS checks for include_name?, but the misnamed predicate was never in...

CVE-2026-44782 Discourse: GroupPostSerializer leaks hidden full names through reaction post association

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, GroupPostSerializer declared includeuserlongname? as the predicate for its :name attribute, but AMS looks for includename?...

CVE-2026-54360 MISP sharing group creation mass assignment allows unauthorized takeover of existing sharing groups

A mass assignment vulnerability exists in MISP’s sharing group creation endpoint. When creating a new sharing group, the controller did not remove a user-supplied id field before saving the submitted data. In CakePHP, supplying a primary key in the save data can cause a create followed by save...

CVE-2026-54360

CVE-2026-54360 affects MISP: the mass assignment in the sharing group creation flow (SharingGroupsController::add) allows an authenticated user to submit an existing group’s id, causing a create() followed by save() to update that group. This could enable takeover or alteration of sharing groups ...