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High 8.8Published Mar 17, 2026
CVE-2026-4148ExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators
Updated under an hour ago ()
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It affects MongoDB Inc MongoDB Server and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mongodb
- NVD analysis
- Analyzed
- Record last updated
- Mar 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
MongoDB Inc MongoDB Server mongodb:server (from the name) | from 8.2 before 8.2.6; from 8.0 before 8.0.20; from 7.0 before 7.0.31 | CNA record |
mongodb mongodb mongodb:mongodb | from 7.0.0 before 7.0.31; from 8.0.0 before 8.0.20; from 8.2.0 before 8.2.6; 8.3.0; 8.3.0; 8.3.0; 8.3.0; 8.3.0 | NVD |
References
- https://jira.mongodb.org/browse/SERVER-119319patch, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.