CVE-2026-100869 Sylius 2.x before 2.1.16 and 2.2.9 Arbitrary Payment Action via Shop API
Attackers with order tokens can trigger unauthorized refunds via the Shop API, causing financial loss while the system incorrectly marks orders as paid.
- 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-2026-100869?
CVE-2026-100869 is a high-severity missing authorization vulnerability in Sylius, published on 27 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Sylius versions before 2.1.16 and 2.2.9 fail to restrict payment request actions in the Shop API endpoint, allowing customers to trigger refunds on completed orders. Attackers with order tokens can submit arbitrary payment actions like refunds that payment gateways execute while Sylius maintains order as paid, causing financial loss.
Weakness: CWE-863
Which versions are affected by CVE-2026-100869?
How do I fix CVE-2026-100869?
No fix has been published for CVE-2026-100869 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-100869 being exploited?
There is no known exploitation of CVE-2026-100869 in the wild and no public exploit code.
Sources
Also known as GHSA-2rv4-pjmm-7fxf, GHSA-3jc5-2834-w7f2.