CVE-2026-110765

FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass

Published Oct 14, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Flexprice
Flexprice flexprice
Vendors & Products Flexprice
Flexprice flexprice
Type Values Removed Values Added
Description 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.
Title FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 9, 2026, 4:32 PM
Reserved
Oct 14, 2026, 5:27 PM
Status
Deferred
Published
Oct 14, 2026, 7:17 PM
Modified
Nov 9, 2026, 5:17 PM