libmongocrypt builds requests to external key management services (AWS, Azure and GCP) by inserting values from key vault documents, KMS…
CVE-2026-114655
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.
Assessment
- CVSS
- 6 (v4.0)
- Severity
- Medium
- EPSS
- 0.27% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 22 October 2026
- Last updated
- 30 October 2026
- Affected
- MONGODB
- Assigner
- mongodb
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
At the source
References
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