CVE-2026-110765
CVE-2026-110765 · FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass
This page contains facts from public vulnerability sources. Check the original advisory before updating.
FlexPrice through 2.1.38 contains an authentication bypass vulnerability in HandleQuickBooksWebhook that skips signature verification when the intuit-signature header is omitted. Unauthenticated attackers knowing a tenant and environment ID can replay forged payment notifications to repeatedly add payment amounts, marking invoices paid or overpaid.
CVSS 8.2 · High · EPSS 0.2%
- Published
- Updated
Affected products and versions
flexprice
- Versions
- ≥ 0, ≤ 2.1.38: Affected (semver)
No fix published
Original sources
- https://hackmd.io/@hieuPenguinnn/flexprice-quickbooks-webhook-signature-bypass
- https://github.com/flexprice/flexprice/blob/f27da32f84ee34bad4bf39a8d887af87fc3f30fc/internal/api/v1/webhook.go#L750
- https://github.com/flexprice/flexprice
- https://www.vulncheck.com/advisories/flexprice-through-2.1.38-quickbooks-webhook-signature-verification-bypass
- https://nvd.nist.gov/vuln/detail/CVE-2026-110765