CVE-2026-81528 Vulnerability Analysis & Exploit Details

CVE-2026-81528
Vulnerability Scoring

5.4
/10
Significant Risk

Security assessments indicate that CVE-2026-81528 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-81528 Details

Status: Analyzed

Last updated: 🕖 29 Sep 2026, 19:16 UTC
Originally published on: 🕗 27 Aug 2026, 20:18 UTC

Time between publication and last update: 32 days

CVSS Release: version 3

CVSS3 Source

cna@mongodb.com

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVE-2026-81528 Vulnerability Summary

CVE-2026-81528: A MongoDB C# driver document-replacement code path omits the element-name/shape validation that the equivalent write paths apply, so a value supplied as a replacement is forwarded to the server without neutralization of query-language special elements. An application that passes untrusted, loosely-typed input as a replacement value therefore allows that input to be interpreted by the database as update logic rather than as data, executing under the application's own database credentials. Applications using strongly-typed document mappings are not affected.

Assessing the Risk of CVE-2026-81528

Access Complexity Graph

The exploitability of CVE-2026-81528 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-81528

CVE-2026-81528 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-81528, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-81528, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2026-81528 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: Low
    Exploiting CVE-2026-81528 may cause minor changes to data without severely impacting its accuracy.
  • Availability: None
    CVE-2026-81528 does not impact system availability.

CVE-2026-81528 References

External References

CWE Common Weakness Enumeration

CWE-943

CAPEC Common Attack Pattern Enumeration and Classification

  • NoSQL Injection CAPEC-676 An adversary targets software that constructs NoSQL statements based on user input or with parameters vulnerable to operator replacement in order to achieve a variety of technical impacts such as escalating privileges, bypassing authentication, and/or executing code.

Vulnerable Configurations

  • cpe:2.3:a:mongodb:c\#_driver:2.10.0:-:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.10.0:-:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.10.0:beta1:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.10.0:beta1:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.10.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.10.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.10.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.10.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.10.3:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.10.3:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.10.4:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.10.4:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.0:-:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.0:-:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.0:beta1:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.0:beta1:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.0:beta2:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.0:beta2:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.3:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.3:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.4:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.4:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.5:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.5:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.11.6:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.11.6:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.12.0:-:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.12.0:-:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.12.0:beta1:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.12.0:beta1:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.12.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.12.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.12.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.12.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.12.3:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.12.3:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.13.0:beta1:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.13.0:beta1:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.13.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.13.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.13.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.13.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.13.3:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.13.3:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.14.0:-:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.14.0:-:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.14.0:beta1:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.14.0:beta1:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.14.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.14.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.15.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.15.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.15.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.15.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.16.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.16.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.16.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.16.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.17.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.17.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.17.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.17.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.18.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.18.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.19.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.19.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.20.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.20.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.21.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.21.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.22.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.22.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.23.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.23.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.23.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.23.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.23.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.23.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.24.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.24.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.25.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.25.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.26.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.26.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.27.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.27.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.28.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.28.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.29.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.29.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:2.30.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:2.30.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.0.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.0.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.1.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.1.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.2.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.2.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.2.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.2.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.3.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.3.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.4.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.4.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.4.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.4.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.4.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.4.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.4.3:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.4.3:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.5.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.5.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.5.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.5.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.5.2:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.5.2:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.6.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.6.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.7.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.7.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.7.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.7.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.8.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.8.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.8.1:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.8.1:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.9.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.9.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.10.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.10.0:*:*:*:*:mongodb:*:*
  • cpe:2.3:a:mongodb:c\#_driver:3.11.0:*:*:*:*:mongodb:*:*
    cpe:2.3:a:mongodb:c\#_driver:3.11.0:*:*:*:*:mongodb:*:*

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