FlexPrice through 2.1.38 contains an authentication bypass vulnerability in HandleQuickBooksWebhook that skips signature verification when the… (CVE-2026-110765)
Description
FlexPrice versions through 2.1.38 have an authentication bypass vulnerability in the HandleQuickBooksWebhook function. The flaw occurs because signature verification is skipped when the intuit-signature header is missing. This allows unauthenticated attackers who know a tenant and environment ID to replay forged payment notifications, potentially marking invoices as paid or overpaid.
CVSS v3.1
Score 5.9medium
Affected software
pkg:github/flexprice/flexpriceRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-110765 describes an authentication bypass vulnerability in FlexPrice through version 2.1.38. The vulnerability exists in the HandleQuickBooksWebhook function, where the system fails to verify the signature if the intuit-signature header is omitted. This allows unauthenticated attackers, with knowledge of tenant and environment IDs, to replay forged payment notifications. The impact is unauthorized modification of invoice payment status, including marking invoices as paid or overpaid.
Potential Impact
The vulnerability enables unauthenticated attackers to bypass authentication checks and replay forged payment notifications. This can lead to financial discrepancies by marking invoices as paid or overpaid without legitimate payment. There is no indication of confidentiality or availability impact. The CVSS score is 5.9 (medium-high), reflecting high impact on integrity but no impact on confidentiality or availability.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to webhook endpoints and validate incoming requests through alternative means if possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-mc76-h4x2-pgj7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-110765"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6ad008942cdf04f656b90cf1
Added to database: 10/14/2026, 22:56:20 UTC
Last enriched: 10/14/2026, 22:59:27 UTC
Last updated: 10/15/2026, 00:08:26 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.