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Fixed values in MongoDB Server $bucket stage may be misread as field references

MongoDB Server · CVE-2026-103965
0 news outlets1 CERTs and agencies0 researchers

What is it?

An issue in MongoDB Server's aggregation framework can cause certain constant values to be handled incorrectly during internal query rewriting. Under certain conditions, an authenticated user with read access may receive field values in aggregation output that the query did not intend to return.

Evidence

CERTs and agencies (1)

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
5.4
EPSS
0.1%
First seen
4 h ago
Status
confirmed

All MongoDB vulnerabilities