# CVE-2026-105628: Plane: OAuth Avatar Redirect SSRF Leads to Internal Data Exfiltration via Static Asset Endpoint

> Attackers can exploit OAuth avatar synchronization to perform Server-Side Request Forgery and exfiltrate internal data via static asset endpoints.

- **Severity:** High 7.6 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-cv9p-325g-wmv5

## What is CVE-2026-105628?

CVE-2026-105628 is a high-severity server-side request forgery vulnerability in makeplane plane, published on 5 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Plane is an open-source project management tool. Prior to 1.4.0, Plane's OAuth avatar synchronization flow fetches avatar_url from provider user data through a server-side HTTP request without internal IP validation and follows redirects by default. An attacker can provide an avatar URL that redirects to an internal-only resource, such as a metadata endpoint, and Plane uploads the fetched response as a user avatar file. The object is then exposed through /api/assets/v2/static/{asset_id}/, allowing exfiltration of internally fetched content. This issue is fixed in 1.4.0.

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

## Which versions are affected by CVE-2026-105628?


## How do I fix CVE-2026-105628?

No fix has been published for CVE-2026-105628 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-105628 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105628 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-105628 and fix it if it is affected.

What it is: CVE-2026-105628 is a high-severity server-side request forgery vulnerability in makeplane plane, published on 5 Oct 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-2026-105628 exists.

Affected product: makeplane plane. 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-2026-105628/ (Markdown: https://insights.sbomify.com/CVE-2026-105628/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-105628
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-105628
- OSV: https://osv.dev/vulnerability/CVE-2026-105628

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-105628/
Summaries are generated and may contain mistakes; the official description above is the record.