CVE-2026-81529

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Source
https://cve.org/CVERecord?id=CVE-2026-81529
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81529.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-81529
Published
2026-08-27T18:32:31Z
Modified
2026-10-01T03:47:39Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N CVSS Calculator
Summary
Connection-option injection via unescaped settings in the canonical MongoDB URL builder
Details

Improper neutralization of delimiters in connection-URL construction allows connection-option injection in the MongoDB C# Driver. When an application passes untrusted text into the driver's connection-URL builder and round-trips the builder back into a client configuration, the untrusted text is serialized without neutralizing the URL/option delimiters and is then re-parsed as authoritative connection options. A low-privileged user of such an application can thereby introduce or suppress security-relevant connection settings.

Database specific 
{
    "cna_assigner": "mongodb",
    "cwe_ids": [
        "CWE-88"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81529.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "3.11.1"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/mongodb/mongo-csharp-driver

Affected ranges

Type
GIT
Repo
https://github.com/mongodb/mongo-csharp-driver
Events
Introduced
569905ff5e778c38ea19d9d0392496a83e1704ed
Fixed
682ad0faea0a03648ee2c4ca8f48c3b04f4c9ab8
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:mongodb:c\\#_driver:*:*:*:*:*:mongodb:*:*",
    "extracted_events": [
        {
            "introduced": "2.10.0"
        },
        {
            "fixed": "3.11.1"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

v2.*
v2.10.0
v2.11.0
v2.11.0-beta1
v2.11.0-beta2
v2.12.0
v2.12.0-beta1
v2.13.0
v2.13.0-beta1
v2.14.0
v2.14.0-beta1
v2.15.0
v2.16.0
v2.17.0
v2.18.0
v2.19.0
v2.20.0
v2.21.0
v2.22.0
v2.23.0
v2.23.1
v2.24.0
v2.25.0
v2.26.0
v2.27.0
v2.28.0
v3.*
v3.0.0
v3.1.0
v3.10.0
v3.11.0
v3.2.0
v3.2.1
v3.3.0
v3.4.0
v3.5.0
v3.6.0
v3.7.0
v3.7.1
v3.8.0
v3.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81529.json"