CVE-2026-9737: CWE-617 Reachable assertion in MongoDB MongoDB Server
CVE-2026-9737 is a high-severity vulnerability in MongoDB Server involving a reachable assertion failure during query planning. The issue arises when the server reads the sort pattern in raw BSONObj form and does not properly handle the meta expression case, potentially causing an invariant failure. This vulnerability affects specific MongoDB Server versions 7.0, 8.0, 8.2.0, and 8.3.0. No official patch or remediation guidance has been provided yet, and there are no known exploits in the wild.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-9737) in MongoDB Server is due to incomplete handling of meta expressions during query planning when processing sort patterns in raw BSONObj form. The lack of explicit handling can lead to incorrect transformations that trigger an invariant failure, categorized as CWE-617 (Reachable Assertion). The CVSS 4.0 base score is 7.1, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on availability. Affected versions include 7.0, 8.0, 8.2.0, and 8.3.0. No patch or official remediation level has been published at this time.
Potential Impact
The vulnerability can cause the MongoDB Server to fail an internal assertion during query planning, which may lead to denial of service or server instability. The CVSS score reflects a high impact on availability without requiring privileges or user interaction. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been published, users should monitor MongoDB's advisories for updates. Until a patch is available, consider limiting exposure of affected MongoDB Server versions to untrusted networks to reduce risk.
CVE-2026-9737: CWE-617 Reachable assertion in MongoDB MongoDB Server
Description
CVE-2026-9737 is a high-severity vulnerability in MongoDB Server involving a reachable assertion failure during query planning. The issue arises when the server reads the sort pattern in raw BSONObj form and does not properly handle the meta expression case, potentially causing an invariant failure. This vulnerability affects specific MongoDB Server versions 7.0, 8.0, 8.2.0, and 8.3.0. No official patch or remediation guidance has been provided yet, and there are no known exploits in the wild.
CVSS v4.0
Score 7.1high
Affected software
pkg:github/mongodb/mongoRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-9737) in MongoDB Server is due to incomplete handling of meta expressions during query planning when processing sort patterns in raw BSONObj form. The lack of explicit handling can lead to incorrect transformations that trigger an invariant failure, categorized as CWE-617 (Reachable Assertion). The CVSS 4.0 base score is 7.1, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on availability. Affected versions include 7.0, 8.0, 8.2.0, and 8.3.0. No patch or official remediation level has been published at this time.
Potential Impact
The vulnerability can cause the MongoDB Server to fail an internal assertion during query planning, which may lead to denial of service or server instability. The CVSS score reflects a high impact on availability without requiring privileges or user interaction. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been published, users should monitor MongoDB's advisories for updates. Until a patch is available, consider limiting exposure of affected MongoDB Server versions to untrusted networks to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-05-27T17:29:34.842Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6123219c2644c7f89b2d44
Added to database: 07/22/2026, 20:08:01 UTC
Last enriched: 07/30/2026, 10:07:10 UTC
Last updated: 09/05/2026, 22:52:14 UTC
Views: 128
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