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VulnerabilityPublished Updated

CVE-2026-110765: flexprice · Improper Verification of Cryptographic Signature

Affects flexpriceSource CVE Database V5

0
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Public exploit available · CVSS 8.2 High.

Data as of 9 Nov 2026, 17:02 UTC

CVSS 4.0 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.08.2
CNA (VulnCheck)CVSS 3.15.9
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:N

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 14 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CISA SSVC: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by VulnCheck

    , 1 hour before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    proof of concept public

    , 45 hours after disclosure

  4. 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

ProductAffectedFixed in
flexpriceflexpriceAffected
  • <=2.1.38
Fixed in–
GitHubflexpricepkg:github/flexpriceOther threatsAffected
  • <=2.1.38
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

Community reviews

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