Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper...

CVE-2026-18693

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server...

CVE-2026-18693 Out-of-Bounds Read/Write in MongoDB Timeseries Bucket Handling Leads to Denial of Service and Potential Memory Disclosure

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server...

EUVD-2026-56909

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server...

Out-of-Bounds Read/Write in MongoDB Timeseries Bucket Handling Leads to Denial of Service and Potential Memory Disclosure

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server...

CVE-2026-18695

An issue in MongoDB Server's handling of certain query predicates against time-series collections with a metaField could allow an authenticated user with write access to cause the server process to terminate unexpectedly, resulting in a denial of service...

CVE-2026-18695

An issue in MongoDB Server's handling of certain query predicates against time-series collections with a metaField could allow an authenticated user with write access to cause the server process to terminate unexpectedly, resulting in a denial of service...

CVE-2026-18695 Improper Input Validation in MongoDB Timeseries Query Processing Leads to Denial of Service

An issue in MongoDB Server's handling of certain query predicates against time-series collections with a metaField could allow an authenticated user with write access to cause the server process to terminate unexpectedly, resulting in a denial of service...

CVE-2026-18690: Incorrect Authorization

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper...

CVE-2026-18698: Incorrect Authorization

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that should require more specific privileges. This could result in exposure of collection metadata and, on certain deployment configurations,...

CVE-2026-18711: Use After Free

An issue in MongoDB Server's query execution engine could allow an authenticated user with read and write privileges to cause an internal reference to be used after the underlying memory has been freed, when running certain queries against time-series collections. This could result in a server...

PT-2026-70850

Name of the Vulnerable Software and Affected Versions MongoDB Server affected versions not specified Description An issue in the handling of timeseries collections allows an authenticated user with write privileges to cause an internal data structure to become inconsistent via specific document...

CVE-2026-18693: Out-of-bounds Write

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server...

PT-2026-70847

Name of the Vulnerable Software and Affected Versions MongoDB Server affected versions not specified Description An issue allows an authenticated user with a limited database-scoped role to perform unauthorized actions against protected system collections. This flaw could enable the dropping and...

CVE-2026-18695: Reachable Assertion

An issue in MongoDB Server's handling of certain query predicates against time-series collections with a metaField could allow an authenticated user with write access to cause the server process to terminate unexpectedly, resulting in a denial of service...

CVE-2026-72915

Mastodon is a free, open-source social network server based on ActivityPub. From 4.6.0-beta.1 until 4.6.4 and 4.7.0-beta.1, any logged-in local user could use the show action in app/controllers/admin/collectionscontroller.rb to access personally identifying information about another local user in...

CVE-2026-72915 Mastodon: Personally-identifying information disclosure due to incorrect access control validation

Mastodon is a free, open-source social network server based on ActivityPub. From 4.6.0-beta.1 until 4.6.4 and 4.7.0-beta.1, any logged-in local user could use the show action in app/controllers/admin/collectionscontroller.rb to access personally identifying information about another local user in...

CVE-2026-72915

Mastodon is a free, open-source social network server based on ActivityPub. From 4.6.0-beta.1 until 4.6.4 and 4.7.0-beta.1, any logged-in local user could use the show action in app/controllers/admin/collectionscontroller.rb to access personally identifying information about another local user in...

CVE-2026-72915

CVE-2026-72915 affects Mastodon versions 4.6.0-beta.1 through 4.6.4 and 4.7.0-beta.1, where a logged-in local user could access PII of another local user via the show action in app/controllers/admin/collections_controller.rb. The vulnerability stems from the controller using the general collectio...

PT-2026-69984

Name of the Vulnerable Software and Affected Versions Mastodon versions 4.6.0-beta.1 through 4.6.3 Mastodon version 4.7.0-beta.1 Description An incorrect access control validation in the show action within app/controllers/admin/collections controller.rb allows any logged-in local user to access...