CVE-2026-4148 (GCVE-0-2026-4148)

Vulnerability from cvelistv5 – Published: 2026-03-17 15:53 – Updated: 2026-03-18 03:55
VLAI?
Title
ExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators
Summary
A use-after-free vulnerability can be triggered in sharded clusters by an authenticated user with the read role who issues a specially crafted $lookup or $graphLookup aggregation pipeline.
Severity ?
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
MongoDB Inc MongoDB Server Affected: 8.2 , < 8.2.6 (custom)
Affected: 8.0 , < 8.0.20 (custom)
Affected: 7.0 , < 7.0.31 (custom)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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