CVE-2026-100872 Sylius 2.x before 2.1.16 and 2.2.9 Payment Amount Overwrite
Unauthenticated attackers can manipulate order totals after payment capture, causing the system to mark inflated orders as fully paid despite lower gateway charges.
- 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-2026-100872?
CVE-2026-100872 is a high-severity 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 validate payment amounts during cart recalculation, allowing unauthenticated attackers to modify order totals after gateway transaction initiation. Attackers can pay a small amount, enlarge the order after gateway capture, and have the system mark the inflated order as fully paid while the gateway captured only the original amount.
Weakness: CWE-345
Which versions are affected by CVE-2026-100872?
How do I fix CVE-2026-100872?
No fix has been published for CVE-2026-100872 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100872 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100872 exists.
Sources
Also known as GHSA-2hp7-mfr2-4fg8, GHSA-vv4h-q2x8-74g4.