Vulnerability · Published Oct 9, 2026 · Assigned by GitHub_M

CVE-2026-107852Jexactyl: Stripe checkout confirmation accepts mismatched-currency/amount payments as full payment (payment forgery)

High 7.1

In plain English

A high-severity insufficient verification of data authenticity in Jexactyl from Jexactyl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.2%top 90.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Jexactyl is a customisable game management panel and billing system. Prior to 4.0.5, the POST /api/client/billing/stripe/process endpoint accepts a client-supplied Stripe Checkout Session when payment_status is paid but does not compare amount_total or currency with the referenced order and configured billing currency. On an instance where the billing module is enabled and a Stripe secret key is configured, an authenticated client can therefore complete a lower-value or mismatched-currency payment and cause the order to be processed, provisioning, renewing, upgrading, or unsuspending the purchased server for less than the required price. This issue is fixed in version 4.0.5.

Affected products (as reported)

Vendor	Product	Versions
Jexactyl	Jexactyl	< 4.0.5

Weakness: CWE-345 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

References

https://github.com/Jexactyl/Jexactyl/security/advisories/GHSA-rf56-676w-hj4g x_refsource_CONFIRM
https://github.com/Jexactyl/Jexactyl/commit/fdee722c560ac13dc2d26271912203a6085dffe3 x_refsource_MISC
https://github.com/Jexactyl/Jexactyl/releases/tag/v4.0.5 x_refsource_MISC