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.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-105628 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105628 exists.
Sources
Also known as GHSA-cv9p-325g-wmv5.