# CVE-2026-44845: JumpServer: Remote Command Execution (RCE) via Jinja Template Injection in Applet Host Deployment

> An authenticated administrator can inject Jinja2 expressions to execute arbitrary commands on the JumpServer control node during Applet Host deployment.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2026
- **Updated:** 18 Aug 2026
- **Also known as:** GHSA-22h6-pcgh-9v7q

## What is CVE-2026-44845?

CVE-2026-44845 is a medium-severity code injection vulnerability in jumpserver, published on 17 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17, an authenticated administrator with Applet Host management and deployment permissions can inject Jinja2 expressions into the IP/Host field or Core Service Address field, causing Ansible to evaluate ansible_host inventory data or playbook variables during Applet Host deployment and execute arbitrary commands on the JumpServer control node. This issue is fixed in version 4.10.17.

Weakness: CWE-1336 (Improper Neutralization of Special Elements Used in a Template Engine)

## Which versions are affected by CVE-2026-44845?


## How do I fix CVE-2026-44845?

No fix has been published for CVE-2026-44845 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-44845 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44845 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44845 and fix it if it is affected.

What it is: CVE-2026-44845 is a medium-severity code injection vulnerability in jumpserver, published on 17 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44845 exists.

Affected product: jumpserver. 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-2026-44845/ (Markdown: https://insights.sbomify.com/CVE-2026-44845/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44845
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44845
- OSV: https://osv.dev/vulnerability/CVE-2026-44845

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44845/
Summaries are generated and may contain mistakes; the official description above is the record.