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CVE-2026-18697

Medium priority
Needs evaluation

An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18696

Medium priority
Needs evaluation

An issue in MongoDB Server's applyOps command could allow an authenticated user with specific non-default privileges to perform certain data-definition operations, such as dropping or modifying collections, against collections...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18695

Medium priority
Needs evaluation

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...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18694

Medium priority
Needs evaluation

An issue in MongoDB Server's geospatial query processing could allow an authenticated user with write privileges to cause certain malformed geometry data to be stored and later processed without proper validation. Subsequent...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18693

Medium priority
Needs evaluation

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...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18692

Medium priority
Needs evaluation

An issue in MongoDB Server's handling of timeseries bucket lifecycle could allow an authenticated user with write privileges to cause an internal reference to be used after the underlying memory has been freed....

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18691

Medium priority
Needs evaluation

An issue in MongoDB Server's intra-cluster connection setup could allow a party with suitable network access to influence which authentication mechanism is used when one replica set member connects to another. Under certain...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18690

Medium priority
Needs evaluation

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...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18688

Medium priority
Needs evaluation

An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-18687

Medium priority
Needs evaluation

MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite...

1 affected package

mongodb

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mongodb Not in release Not in release Not in release Needs evaluation Needs evaluation
Show less packages