CVE-2026-18696

MEDIUMCVSS 6.5/10EPSS 0.29%

Last modified

CVE-2026-18696 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue in MongoDB Server's applyOps command could allow an authenticated user with specific non-default privileges to perform certain data-definition operations, such as dropping or modifying collections, against collections they do not have permission to manipulate. This is due to an inconsistency in how the target collection is determined between the authorization check and the actual operation.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

An issue in MongoDB Server's applyOps command could allow an authenticated user with specific non-default privileges to perform certain data-definition operations, such as dropping or modifying collections, against collections they do not have permission to manipulate. This is due to an inconsistency in how the target collection is determined between the authorization check and the actual operation.

Metrics

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
MongodbMongodb>= 7.0.0, < 7.0.40—
MongodbMongodb>= 8.0.0, < 8.0.29—
MongodbMongodb>= 8.2.0, <= 8.2.12—
MongodbMongodb>= 8.3.0, < 8.3.8—
MongodbMongodb9.0.0Alpha0
MongodbMongodb9.1.0Alpha0

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-18696?
An issue in MongoDB Server's applyOps command could allow an authenticated user with specific non-default privileges to perform certain data-definition operations, such as dropping or modifying collections, against collections they do not have permission to manipulate. This is due to an inconsistency in how the target collection is determined between the authorization check and the actual operation.
How severe is CVE-2026-18696?
CVE-2026-18696 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-18696?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST