CVE WatchSep 8, 2026

CVE-2026-82060

In MongoDB, insufficient validation of shard key values during document insertion allowed authenticated users to store documents with specia

CVSS

5.4

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 8, 2026 · Last modified: Sep 8, 2026 · CWE-943

EPSS · 30d

Not enough EPSS history yet.

Technical description

In MongoDB, insufficient validation of shard key values during document insertion allowed authenticated users to store documents with specially crafted, operator-shaped objects as shard key values in sharded collections. When change stream events for such documents were processed with the updateLookup full document mode, the crafted values were embedded into internal post-image lookup queries without proper sanitization, causing them to be interpreted as query operators rather than literal equality values. This could result in change stream consumers receiving incorrect post-image documents or encountering non-resumable fatal errors.

Official references

jira.mongodb.orghttps://jira.mongodb.org/browse/SERVER-131202

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