# CVE-2026-70436: Missing authorization in Jenkins External Workspace Manager Plugin

> Attackers with Overall/Read permission can read unauthorized workspace files due to missing or improper permission checks in the Jenkins External Workspace Manager Plugin.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Aug 2026
- **Updated:** 6 Aug 2026
- **Also known as:** GHSA-w8fh-xx7f-5j67

## What is CVE-2026-70436?

CVE-2026-70436 is a medium-severity missing authorization vulnerability in Jenkins External Workspace Manager Plugin, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Jenkins External Workspace Manager Plugin 1.4.1 and earlier does not perform a permission check (1.4.0 and earlier) or performs an improper permission check (1.4.1) when providing access to externally-managed workspaces through the workspace browser, allowing attackers with Overall/Read permission to read files in workspaces they are not authorized to access.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-70436?


## How do I fix CVE-2026-70436?

No fix has been published for CVE-2026-70436 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-70436 being exploited?

There is no known exploitation of CVE-2026-70436 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-70436 and fix it if it is affected.

What it is: CVE-2026-70436 is a medium-severity missing authorization vulnerability in Jenkins External Workspace Manager Plugin, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-70436 in the wild and no public exploit code.

Affected product: Jenkins External Workspace Manager Plugin. 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-2026-70436/ (Markdown: https://insights.sbomify.com/CVE-2026-70436/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-70436
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-70436
- OSV: https://osv.dev/vulnerability/CVE-2026-70436

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-70436/
Summaries are generated and may contain mistakes; the official description above is the record.