# CVE-2026-38974: Security feature bypass in n/a

> Dulwich library fails to verify SSH host keys, allowing attackers to perform man-in-the-middle attacks during Git operations.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Jul 2026
- **Updated:** 16 Jul 2026
- **Also known as:** AZL-92481, CLEANSTART-2026-MJ22744, DEBIAN-CVE-2026-38974, GHSA-h7fr-r783-5g99, SUSE-SU-2026:3408-1, SUSE-SU-2026:3459-1, UBUNTU-CVE-2026-38974

## What is CVE-2026-38974?

CVE-2026-38974 is a medium-severity vulnerability in n/a, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Dulwich through 1.1.0 was found to be missing SSH host key verification in contrib/paramiko_vendor.py.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2026-38974?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `python3-dulwich` | SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 0.20.24-150400.11.1 |
| `python-dulwich` | SUSE:Linux Enterprise Module for Public Cloud 12 | All versions | 0.18.5-4.9.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Server 15 SP6-LTSS | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 0.20.24-150400.11.1 |
| `python3-dulwich` | SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | All versions | 0.20.24-150400.11.1 |

## How do I fix CVE-2026-38974?

Upgrade to a fixed version.

## Is CVE-2026-38974 being exploited?

There is no known exploitation of CVE-2026-38974 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-38974 and fix it if it is affected.

What it is: CVE-2026-38974 is a medium-severity vulnerability in n/a, published on 15 Jul 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-2026-38974 in the wild and no public exploit code.

Affected product: n/a. 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-2026-38974/ (Markdown: https://insights.sbomify.com/CVE-2026-38974/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-38974
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-38974
- OSV: https://osv.dev/vulnerability/CVE-2026-38974

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-38974/
Summaries are generated and may contain mistakes; the official description above is the record.