# CVE-2026-30242: Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer

> Workspace admins can exploit incomplete IP validation to perform Server-Side Request Forgery, accessing internal network resources and reading responses.

- **Severity:** High 8.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/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:** Yes
- **Published:** 6 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** GHSA-fpx8-73gf-7x73

## What is CVE-2026-30242?

CVE-2026-30242 is a high-severity server-side request forgery vulnerability in makeplane plane, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Plane is an an open-source project management tool. Prior to version 1.2.3, the webhook URL validation in plane/app/serializers/webhook.py only checks ip.is_loopback, allowing attackers with workspace ADMIN role to create webhooks pointing to private/internal network addresses (10.x.x.x, 172.16.x.x, 192.168.x.x, 169.254.169.254, etc.). When webhook events fire, the server makes requests to these internal addresses and stores the response — enabling SSRF with full response read-back. This issue has been patched in version 1.2.3.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-30242?

2 open source packages ship an affected version, including plane. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `plane` | PyPI | All versions | 1.2.3 |
| `plane` | PyPI | All versions | 1.2.3 |

Products: Plane Plane.

## How do I fix CVE-2026-30242?

Upgrade plane to 1.2.3 or later.

## Is CVE-2026-30242 being exploited?

There is no known exploitation of CVE-2026-30242 in the wild and no public exploit code.

## Other vulnerabilities in makeplane plane

- [CVE-2024-47830](https://insights.sbomify.com/CVE-2024-47830/): Plane allows server side request forgery via /_next/image endpoint (critical 9.3)
- [CVE-2026-46558](https://insights.sbomify.com/CVE-2026-46558/): Missing authorization in plane (high 8.3)
- [CVE-2026-39843](https://insights.sbomify.com/CVE-2026-39843/): Plane has a Server-Side Request Forgery (SSRF) in Favicon Fetching (high 7.7)
- [CVE-2026-27706](https://insights.sbomify.com/CVE-2026-27706/): Plane Vulnerable to Full Read SSRF via Favicon Fetching in "Add Link" Feature (high 7.7)
- [CVE-2026-30244](https://insights.sbomify.com/CVE-2026-30244/): Plane: Unauthenticated Workspace Member Information Disclosure (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30242 and fix it if it is affected.

What it is: CVE-2026-30242 is a high-severity server-side request forgery vulnerability in makeplane plane, published on 6 Mar 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-2026-30242 in the wild and no public exploit code.

Affected packages and fixed versions:
- plane (PyPI): affected all versions; fixed in 1.2.3
- plane (PyPI): affected all versions; fixed in 1.2.3

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-2026-30242/ (Markdown: https://insights.sbomify.com/CVE-2026-30242/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30242
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30242
- OSV: https://osv.dev/vulnerability/CVE-2026-30242

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-30242/
Summaries are generated and may contain mistakes; the official description above is the record.