CVE-2026-23796: Quick.Cart allows a user's session identifier to be set before authentication

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2026-23796 is a critical-severity flaw (CVSS 9.8) affecting quick.cart. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 vulnerabl

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-384
Published	2026-02-05
Last modified	2026-06-17

Publisher (CNA): CERT.PL · Vendor: opensolution

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-05 12:16 UTCPublished CVE record published
2026-06-17 10:22 UTCUpdated Record last modified

opensolution quick.cart DOWNGRADE

Affected: 6.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.7

1. Check installed version

apt-cache policy quick.cart || rpm -q quick.cart || quick.cart --version

2. No fixed release: DOWNGRADE to a release before 6.7 (Debian / Ubuntu)

apt-cache madison quick.cart sudo apt install quick.cart=<VERSION_BEFORE_6.7> sudo apt-mark hold quick.cart

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list quick.cart sudo dnf downgrade quick.cart-<VERSION_BEFORE_6.7> sudo dnf versionlock add quick.cart

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-23796?

quick.cart: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-23796 being exploited?

CVE-2026-23796 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-23796 affect?

CVE-2026-23796 affects quick.cart. Severity is critical (CVSS 9.8). 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 authen

How urgent is CVE-2026-23796?

Priority 45/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-23797 MEDIUM 4.9 DOWNGRADE In Quick.Cart user passwords are stored in plaintext form
CVE-2025-67684 HIGH 7.2 DOWNGRADE Quick.Cart is vulnerable to Local File Inclusion and Path Traversal issues in the theme selection mechanism
CVE-2025-67683 MEDIUM 6.1 DOWNGRADE Quick.Cart is vulnerable to reflected XSS via the sSort parameter

References

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