CVE-2023-26686: File Upload vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to run arbitrary code via the

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-26686 is a critical-severity flaw (CVSS 9.8) affecting cs-cart multivendor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File Upload vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to run arbitrary code via the image upload feature when customizing a shop.

Why this priority

Critical severity
Public exploit reference
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	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-434
Published	2024-09-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cs-cart

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

Am I affected?

Timeline

2024-09-25 01:15 UTCPublished CVE record published
2026-06-17 05:43 UTCUpdated Record last modified

cs-cart cs-cart multivendor DOWNGRADE

Affected: 4.16.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.16.1

1. Check installed version

apt-cache policy cs-cart-multivendor || rpm -q cs-cart-multivendor || cs-cart-multivendor --version

2. No fixed release: DOWNGRADE to a release before 4.16.1 (Debian / Ubuntu)

apt-cache madison cs-cart-multivendor sudo apt install cs-cart-multivendor=<VERSION_BEFORE_4.16.1> sudo apt-mark hold cs-cart-multivendor

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

dnf --showduplicates list cs-cart-multivendor sudo dnf downgrade cs-cart-multivendor-<VERSION_BEFORE_4.16.1> sudo dnf versionlock add cs-cart-multivendor

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-2023-26686?

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

Is CVE-2023-26686 being exploited?

CVE-2023-26686 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-2023-26686 affect?

CVE-2023-26686 affects cs-cart multivendor. Severity is critical (CVSS 9.8). File Upload vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to run arbitrary code via the image upload feature when customizing a shop.

How urgent is CVE-2023-26686?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-26691 HIGH 7.2 DOWNGRADE Directory Traversal vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to run arbitrary code
CVE-2023-26690 HIGH 8.8 DOWNGRADE File Upload vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to run arbitrary code via File
CVE-2023-26689 CRITICAL 9.8 DOWNGRADE An issue discovered in CS-Cart MultiVendor 4.16.1 allows attackers to alter arbitrary user account profiles vi
CVE-2023-26688 MEDIUM 5.4 DOWNGRADE Cross Site Scripting (XSS) vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to run arbitrar
CVE-2023-26687 HIGH 8.8 DOWNGRADE Directory Traversal vulnerability in CS-Cart MultiVendor 4.16.1 allows remote attackers to obtain sensitive in

References

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