# CVE-2026-44467: Claude Desktop: SSH Host Key Verification Bypass Allows Man-in-the-Middle Attack on Remote Sessions

> Attackers can intercept SSH traffic to perform man-in-the-middle attacks on remote development sessions due to missing host key verification.

- **Severity:** High 7.4 (`CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 May 2026
- **Updated:** 14 May 2026

## What is CVE-2026-44467?

CVE-2026-44467 is a high-severity vulnerability in anthropics claude-code, published on 13 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. From 1.2581.0 to before 1.4304.0, Claude Desktop's SSH remote development feature verified only whether a hostname existed in ~/.ssh/known_hosts without comparing the server's presented host key against the stored key. This allowed a network-positioned attacker to present an arbitrary SSH host key and have the connection silently accepted, enabling a man-in-the-middle attack on remote development sessions. Successful exploitation required the attacker to be in a network position to intercept SSH traffic (e.g., via ARP spoofing, rogue Wi-Fi, or DNS poisoning) and the target hostname to already have an entry in the victim's known_hosts file. This vulnerability is fixed in 1.4304.0.

Weakness: CWE-322 (Key Exchange without Entity Authentication), CWE-297 (Improper Validation of Certificate with Host Mismatch)

## Which versions are affected by CVE-2026-44467?

It affects 1 product.


Products: Anthropic Claude Desktop.

## How do I fix CVE-2026-44467?

No fix has been published for CVE-2026-44467 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-44467 being exploited?

There is no known exploitation of CVE-2026-44467 in the wild and no public exploit code.

## Other vulnerabilities in anthropics claude-code

- [CVE-2026-44470](https://insights.sbomify.com/CVE-2026-44470/): Claude Desktop: Local Privilege Escalation via Directory Junction in CoworkVMService (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44467 and fix it if it is affected.

What it is: CVE-2026-44467 is a high-severity vulnerability in anthropics claude-code, published on 13 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-44467 in the wild and no public exploit code.

Affected product: anthropics claude-code. 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-2026-44467/ (Markdown: https://insights.sbomify.com/CVE-2026-44467/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44467
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44467
- OSV: https://osv.dev/vulnerability/CVE-2026-44467

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-44467/
Summaries are generated and may contain mistakes; the official description above is the record.