High severity · published Mar 17, 2026
CVE-2026-4358
Memory safety issues in slot-based execution hash table spill
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution (SBE) engine when an in-memory hash table is spilled to disk.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
7.0.0 before 7.0.31; 8.0.0 before 8.0.20; 8.2.0 before 8.2.6 · source: NVD
MS
MongoDB Server · MongoDB Inc
8.2 before 8.2.6; 8.0 before 8.0.20; 7.0 before 7.0.31 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4358
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4358
Exploit
https://jira.mongodb.org/browse/SERVER-118849
More from MongoDB
9.9
CVE-2019-10758
MongoDB mongo-express Remote Code Execution Vulnerability
7.5
CVE-2025-14847
Zlib compressed protocol header length confusion may allow memory read
9.8
CVE-2026-19001
MongoDB BI Connector ODBC driver may write outside an allocated buffer when handling oversized catalog object names
9.8
CVE-2025-3085
A MongoDB server under specific conditions running on Linux with TLS and CRL revocation status checking enabled, fails to check the revocation status of the intermediate…
9.8
CVE-2024-8654
MongoDB Server may access non-initialized region of memory leading to unexpected behaviour