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TI-2026-70288 Aliases CVE-2026-107852

Stripe checkout confirmation in Jexactyl accepts mismatched payments

Priority MEDIUM 64CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

Jexactyl before 4.0.5 is a customisable game management panel and billing system. Its Stripe checkout confirmation does not verify that the amount and currency of a payment match the order (CWE-345). An authenticated client on an instance with the billing module enabled and a Stripe secret key configured can complete a lower value or mismatched currency payment and have the server provisioned, renewed, upgraded or unsuspended for less than the required price.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00196 9th percentileScored 2026-11-07
Fix Fixed Jexactyl (Jexactyl): 4.0.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JexactylJexactylbefore 4.0.54.0.5Patch availableCNA
  • Jexactyl VendorJexactyl Affected before 4.0.5 Fixed in 4.0.5 Patch available CNA

Remediation

Upgrade Jexactyl to version 4.0.5, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Jexactyl (Jexactyl) Fixed in 4.0.5

Timeline

  1. 2026-10-10 Threatist record created from CVE-2026-107852
  2. 2026-10-11 Priority changed: MEDIUM → LOW
  3. 2026-10-14 CISA SSVC decision points changed
  4. 2026-10-14 Priority changed: LOW → MEDIUM

References

Other 3

  • TI-2026-25503 Jexactyl has Stored DOM Cross-Site Scripting (XSS) via unescaped JSON in Blade template CVSS 3.1MEDIUM 5.8
  • TI-2026-70289 Jexactyl billing endpoint lets users renew or unsuspend other servers CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences