CVE-2026-50886 Project Firefly III has incorrect access control in the webhook management component
Attackers can scan internal resources via crafted POST requests due to incorrect access control in the webhook management component.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-50886?
CVE-2026-50886 is a critical server-side request forgery vulnerability in n/a, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect access control in the webhook management component of Project Firefly III v6.5.9 allows attackers to scan internal resources via a crafted POST request.
Weakness: CWE-284
Which versions are affected by CVE-2026-50886?
2 open source packages ship an affected version, including grumpydictator/firefly-iii.
| Package | Affected | Fixed in |
|---|---|---|
grumpydictator/firefly-iii Packagist | All versions to 6.5.9 | None |
grumpydictator/firefly-iii Packagist | All versions to 6.5.9 | None |
How do I fix CVE-2026-50886?
No fix has been published for CVE-2026-50886 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-2026-50886 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50886 exists.
Sources
Also known as GHSA-9mmg-q95p-gp67.