# CVE-2026-107325: Application denial of service via missing BSON array length validation in MongoDB Go Driver

> An attacker can cause a denial of service by supplying malformed BSON data to applications using the MongoDB Go Driver, triggering a runtime panic.

- **Severity:** High 8.2 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** AZL-107057, AZL-107090, AZL-107108, AZL-107547, AZL-107579, AZL-107595, AZL-107655, AZL-107697, AZL-107802, AZL-107865, AZL-107907, DEBIAN-CVE-2026-107325, GHSA-frr6-8pf7-f9r2, UBUNTU-CVE-2026-107325

## What is CVE-2026-107325?

CVE-2026-107325 is a high-severity denial of service vulnerability in MongoDB Go Driver, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper validation of a BSON array length in the MongoDB Go Driver can cause an out-of-bounds index and runtime panic when an application calls bson.RawArray.Validate or bsoncore.Array.Validate on a malformed four-byte array. An unauthenticated actor who can supply raw BSON array data to an affected application may terminate an unprotected application process, causing a denial of service. No confidentiality or integrity impact has been identified.

Weakness: CWE-129 (Improper Validation of Array Index)

## Which versions are affected by CVE-2026-107325?

It affects 1 product.


Products: Mongodb Go Driver.

## How do I fix CVE-2026-107325?

No fix has been published for CVE-2026-107325 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-107325 being exploited?

There is no known exploitation of CVE-2026-107325 in the wild and no public exploit code.

## Other vulnerabilities in MongoDB Go Driver

- [CVE-2026-107324](https://insights.sbomify.com/CVE-2026-107324/): Application denial of service via integer overflow in BSON value-length validation in MongoDB Go Driver (high 8.2)
- [CVE-2026-81521](https://insights.sbomify.com/CVE-2026-81521/): Cross-database write retargeting via unvalidated dotted database name in Client.BulkWrite in the MongoDB Go Driver (high 7.1)
- [CVE-2021-20329](https://insights.sbomify.com/CVE-2021-20329/): Specific cstrings input may not be properly validated in the Go Driver (medium 6.8)
- [CVE-2026-88031](https://insights.sbomify.com/CVE-2026-88031/): GridFS data deletion via query-operator injection in file IDs in the MongoDB Go Driver (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107325 and fix it if it is affected.

What it is: CVE-2026-107325 is a high-severity denial of service vulnerability in MongoDB Go Driver, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107325 in the wild and no public exploit code.

Affected product: MongoDB Go Driver. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-107325/ (Markdown: https://insights.sbomify.com/CVE-2026-107325/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107325
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107325
- OSV: https://osv.dev/vulnerability/CVE-2026-107325

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107325/
Summaries are generated and may contain mistakes; the official description above is the record.