Is CVE-2026-107325 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107325 being exploited in the wild.

How severe is CVE-2026-107325?

Medium severity, with a CVSS score of 5.9, published 8 October 2026.

Which products and versions are affected?

MongoDB Go Driver before 2.9.2.

Is there a fix for CVE-2026-107325?

Yes: fixed in 2.9.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107325 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-107325?

Check whether you run MongoDB Go Driver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107325: MongoDB Go Driver BSON array validation out-of-bounds

CVE-2026-107325 · Severity: medium · CVSS 5.9 · Published 2026-10-08

The MongoDB Go Driver library, which handles binary data serialization in Go applications, contains a flaw in how it validates array length fields. An attacker who supplies malformed array data can crash the application process, causing a denial of service. This affects any Go application using the affected driver versions to parse untrusted BSON data.

Technologies: MongoDB Go Driver. Vendors: MongoDB.

Quick answers

Is CVE-2026-107325 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107325 being exploited in the wild.
How severe is CVE-2026-107325?: Medium severity, with a CVSS score of 5.9, published 8 October 2026.
Which products and versions are affected?: MongoDB Go Driver before 2.9.2.
Is there a fix for CVE-2026-107325?: Yes: fixed in 2.9.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107325 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-107325?: Check whether you run MongoDB Go Driver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2.9.2

Technical details

The Go Driver's bson.RawArray.Validate, bsoncore.Array.Validate, and bsoncore.NewArrayFromReader functions fail to enforce the 5-byte BSON document minimum before indexing or slicing buffers with a length prefix read from untrusted input. A malformed array declaring a length below 5 bytes causes out-of-bounds array access and runtime panic. The fix validates declared lengths against the 5-byte minimum and returns ErrInvalidLength instead of panicking.

Affected products

MongoDB Go Driver before 2.9.2

Timeline

2026-10-08: disclosed: CVE-2026-107325 published
2026-09-22: patched: Fix resolved in GODRIVER-4136

References

https://jira.mongodb.org/browse/GODRIVER-4136

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