Quick answers
- Is CVE-2026-82191 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-82191 being exploited in the wild.
- How severe is CVE-2026-82191?
- Informational severity, with a CVSS score of 2.7, published 15 September 2026.
- Which products and versions are affected?
- J2commerce.Com J2Store 1.0.0–3.3.2, 4.0.0–4.0.22, 4.1.0–4.1.7.
- Is there a fix for CVE-2026-82191?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-82191 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-82191?
- Check whether you run J2commerce.Com J2Store 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.
Technical details
The vulnerability is a parameter injection/smuggling flaw in the PayPal notify endpoint of J2Store's checkout controller. Unescaped request data from a crafted link is reflected into a redirect response, allowing an attacker to inject arbitrary query parameters into the follow-up checkout confirmation request. The attack requires social engineering (convincing a user to click the malicious link), and the injected parameters are limited to what the checkout controller already accepts. The vulnerability affects J2Store versions 1.0.0–3.3.2, 4.0.0–4.0.22, and 4.1.0–4.1.7. No active exploitation in the wild has been reported.
Affected products
- j2commerce.com J2Store 1.0.0–3.3.2, 4.0.0–4.0.22, 4.1.0–4.1.7
Timeline
- 2026-09-15: disclosed