Description
An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MongoDB | libmongocrypt | < 1.20.2 | 1.20.2 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libmongocrypt | 1.20.2-1 | — |
| Debian 13 | libmongocrypt | No fix yet | — |
| Debian 12 | libmongocrypt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libmongocrypt | No fix yet | — |
| Ubuntu 24.04 LTS | libmongocrypt | No fix yet | — |
| Ubuntu 22.04 LTS | libmongocrypt | No fix yet | — |
Advisories 1
- WID-SEC-2026-3209 MongoDB: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 4, 2026