CVE-2026-81526
MEDIUMDescription
The MongoDB Rust Driver does not neutralize special characters in a caller-supplied target identifier before embedding it in the request it sends to the server. An actor able to influence that identifier in an application using the driver may cause write operations to be applied to an unintended target within the same deployment using the application's own credentials. This may result in unauthorized modification of data belonging to another logical boundary enforced by the application.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 10% of all known CVEs.
References
Related Vulnerabilities
Other CWE-74 (Injection) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2013-2251 | Critical | 9.8 | 100% | KEV | Fix |
| CVE-2023-22527 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2019-2725 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2022-46169 | Critical | 9.8 | 100% | KEV | Fix |
| CVE-2022-35914 | Critical | 9.8 | 100% | KEV | - |
| CVE-2019-17558 | High | 7.5 | 99% | KEV | Fix |
Common questions
How do I fix CVE-2026-81526?
No published fix for CVE-2026-81526 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-81526 being actively exploited?
Not that we know of. CVE-2026-81526 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.
How severe is CVE-2026-81526?
CVE-2026-81526 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-28.