Vulnerability in Opensolution Quick.cart
CVE-2026-23796
Quick.Cart allows a user's session identifier to be set before authentication. The value of this session ID stays the same after authentication. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only version 6.7 was tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (18.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Opensolution Quick.cart — versions 6.7
Weakness classification (CWE)
References
- opensolution.org/sklep-internetowy-quick-cart.html (Product, product)
- cert.pl/posts/2026/02/CVE-2026-23796 (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-23796?
- CVE-2026-23796 is a critical-severity vulnerability in Opensolution Quick.cart, classified under Session Fixation. CVSS score: 9.8/10. Published 2026-02-05.
- How severe is CVE-2026-23796?
- Critical severity. CVSS v3 base score is 9.8 out of 10.