Description
A memory management flaw in the MongoDB C Driver's handling of compressed responses may cause the client library to hold on to memory that is never released. An unauthenticated party that controls the database endpoint a client application connects to may cause repeated, unbounded memory growth in that application, which may result in the application becoming unavailable. No credentials, transport security settings, or user interaction are required.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MongoDB | C Driver | 1.25.0 – ≤ 1.30.14, 2.0.0 – ≤ 2.5.7 | — |
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 | mongo-c-driver | 2.5.8-1 | — |
| Debian 13 | mongo-c-driver | No fix yet | — |
| Debian 12 | mongo-c-driver | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mongo-c-driver | No fix yet | — |
| Ubuntu 26.04 LTS | mongo-c-driver | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | mongo-c-driver | No fix yet | — |
| Ubuntu Pro 22.04 LTS | mongo-c-driver | No fix yet | — |
| Ubuntu Pro 20.04 LTS | mongo-c-driver | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mongo-c-driver | 2.5.8-1.1 | openSUSE-SU-2026:12437-1 |
Advisories 2
- openSUSE-SU-2026:12437-1 bson-devel-2.5.8-1.1 on GA media SUSE / openSUSE Security Updates · Nov 6, 2026
- WID-SEC-2026-4328 MongoDB (EF Core Provider, Atlas SQL, C Treiber, Rust Treiber, Database Tools und Node.js Treiber): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026