# CVE-2026-113468: TYPO3 Shop payment notification endpoint signature verification bypass

Source: https://junglewise.ai/threats/cve-2026-113468-the-payment-notification-endpoint-for-paypal-accepts-incoming  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-113468 · Severity: info · Published 2026-10-20

The TYPO3 Shop extension, a payment and order management plugin for the TYPO3 content management system, fails to verify PayPal payment notifications. An attacker can forge payment confirmations to manipulate orders awaiting payment, potentially leading to fraudulent transactions or data tampering. Already-paid orders are not affected.

Vendors: [Typo3](https://junglewise.ai/threats/vendors/typo3).

## Quick answers

**Is CVE-2026-113468 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-113468 being exploited in the wild.

**How severe is CVE-2026-113468?** Informational severity, published 20 October 2026.

**Which products and versions are affected?** Typo3 Shop 4.9.3 and below, 5.0.0–5.21.0, 6.0.0–6.2.0.

**Is there a fix for CVE-2026-113468?** Yes: fixed in 4.9.4, 5.21.1, 6.3.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-113468 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-113468?** Check whether you run Typo3 Shop at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 4.9.4, 5.21.1, 6.3.0

## Technical details

The payment notification endpoint accepts PayPal webhook data without cryptographic verification of the sender's identity, allowing any unauthenticated network request to overwrite pending order payment status. The vulnerability requires the shop's order plugin to be active on a page, and affects only orders in "awaiting payment" state. This is a classic webhook validation bypass (CWE-862: Missing Authorization).

## Affected products

- TYPO3 Shop 4.9.3 and below, 5.0.0–5.21.0, 6.0.0–6.2.0

## Timeline

- 2026-10-20: disclosed

## References

- [https://packagist.org/](https://packagist.org/)
- [https://typo3.org/security/advisory/typo3-ext-sa-2026-036](https://typo3.org/security/advisory/typo3-ext-sa-2026-036)