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CVE-2026-110765— FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass

Quick assessment

Affected
flexprice flexprice
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlexPrice 2.1.38 及更早版本在 HandleQuickBooksWebhook 函数中存在身份验证绕过漏洞。当请求中缺少 头字段时，该函数会跳过对签名的验证。攻击者在获知租户 ID 和环境 ID 后，可以重放伪造的支付通知，反复添加支付金额，从而导致发票被标记为已支付或超额支付。

CVSS 5.9 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
flexprice flexprice ≤ 2.1.38 affected
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I. Basic Information for CVE-2026-110765

Vulnerability Information
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Vulnerability Title
FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
flexprice flexprice 0 ~ 2.1.38 -

II. Public POCs for CVE-2026-110765

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III. Intelligence Information for CVE-2026-110765

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Other References for CVE-2026-110765 (3)

IV. Related Vulnerabilities

Same weakness: CWE-347

V. Comments for CVE-2026-110765

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