Vulnerability Description
libmongocrypt builds requests to external key management services (AWS, Azure and GCP) by inserting values from key vault documents, KMS provider configuration and KMS responses into request lines, headers and signed request bodies without validating or encoding them for each context. A user with write access to the key vault collection can alter the structure of these requests, including adding members to request bodies and token claims that the library then signs with the application's credentials. This may result in key management operations being performed with parameters the application did not intend.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/mongodb/libmongocrypt/releases/tag/1.21.1
- https://github.com/mongodb/libmongocrypt/security/advisories/GHSA-7mvq-mg47-m88j
- https://jira.mongodb.org/browse/MONGOCRYPT-963
FAQ
What is CVE-2026-114655?
CVE-2026-114655 is a vulnerability with a CVSS score of 5.9 (MEDIUM). libmongocrypt builds requests to external key management services (AWS, Azure and GCP) by inserting values from key vault documents, KMS provider configuration and KMS responses into request lines, he...
How severe is CVE-2026-114655?
CVE-2026-114655 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-114655?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.