Intuit FlexPrice up to 2.1.38 Webhook Signature Verification HandleQuickBooksWebhook intuit-signature signature verification

Summaryinfo

A vulnerability, which was classified as problematic, was found in Intuit FlexPrice up to 2.1.38. This vulnerability affects the function HandleQuickBooksWebhook of the component Webhook Signature Verification. The manipulation of the argument intuit-signature results in signature verification. This vulnerability is cataloged as CVE-2026-110765. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Intuit FlexPrice up to 2.1.38. It has been classified as problematic. Affected is the function HandleQuickBooksWebhook of the component Webhook Signature Verification. The manipulation of the argument intuit-signature with an unknown input leads to a signature verification vulnerability. CWE is classifying the issue as CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is shared for download at hackmd.io. This vulnerability is traded as CVE-2026-110765 since 10/14/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/14/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Intuit

Name

• FlexPrice

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.1.11
• 2.1.12
• 2.1.13
• 2.1.14
• 2.1.15
• 2.1.16
• 2.1.17
• 2.1.18
• 2.1.19
• 2.1.20
• 2.1.21
• 2.1.22
• 2.1.23
• 2.1.24
• 2.1.25
• 2.1.26
• 2.1.27
• 2.1.28
• 2.1.29
• 2.1.30
• 2.1.31
• 2.1.32
• 2.1.33
• 2.1.34
• 2.1.35
• 2.1.36
• 2.1.37
• 2.1.38

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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