CVE-2026-110765: flexprice · Improper Verification of Cryptographic Signature
Affects flexpriceSource CVE Database V5
Public exploit available · CVSS 8.2 High.
Data as of 9 Nov 2026, 17:02 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 8.2 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 5.9 |
- CISA SSVC
- Exploitation
- Proof of concept is public or traded
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-10-16.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 14 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CISA SSVC: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by VulnCheck
, 1 hour before disclosure
CVE published
on cve.org
, t = 0
CISA SSVC assessment
proof of concept public
, 45 hours after disclosure
In Threat Radar
record ingested
, 26 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| flexpriceflexprice | Affected
| Fixed in– |
GitHubflexpricepkg:github/flexpriceOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, organizations should consider additional validation controls on payment notifications and monitor for suspicious invoice status changes.
Description
FlexPrice versions up to 2.1.38 have an authentication bypass vulnerability in the HandleQuickBooksWebhook function. The flaw occurs because signature verification is skipped if 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.
References
- hackmd.io/@hieuPenguinnn/flexprice-quickbooks-webhook-signature-bypass (opens in a new tab)
- github.com/flexprice/flexprice/blob/f27da32f84ee34bad4bf39a8d887af87fc3f30fc/internal/api/v1/webhook.go (opens in a new tab)
- github.com/flexprice/flexprice (opens in a new tab)
- vulncheck.com/advisories/flexprice-through-2.1.38-quickbooks-webhook-signature-verification-bypass (opens in a new tab)