CVE-2026-54390Critical· 9.8▾ AbyssalPoC available

JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer

▾ Abyssal zone — Critical with a public exploit or in-the-wild use

Depth score66/ 100 · Elevated

impact 53.9 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Jun 18, 2026

Updated

Oct 29, 2026

CVSS

9.8

Vendor

JTL Software

Product

JTL Shop

CWE

CWE-1336

Depth score

66 · Elevated

EPSS

0.60% · p49

Platforms

—

Source

CVEORG

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit availability

Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.

checked 2026-11-03

GitHub PoCs

1 public repository

shinthink/CVE-2026-54390 ↗

CISA SSVC

decided 2026-06-22

Exploitation: none
Automatable: yes
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.

EPSS history

Exploit-prediction probability, daily snapshots since Nov 3.

0.6% → 0.6%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 138 days

Jun 18, 2026Published
Disclosed via CVEORG
Oct 29, 2026Record revised
Last analysed / modified upstream
Nov 3, 2026EPSS first tracked
0.6%
Nov 3, 2026Public exploit observed
1 GitHub repo (last check)

JTL Software CWE-1336 #cve.org #exploit-available

Affected

jtl_shop >= 5.2.0 < 5.4.0
jtl_shop >= 5.4.0 < 5.5.4
jtl_shop >= 5.6.0 < 5.6.2
jtl_shop >= 5.7.0 < 5.7.2

Full technical detail▾

Overview

JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized user-supplied input passed to the Smarty template engine. Attackers can exploit this flaw to read sensitive server-side values such as database credentials and encryption keys, and on versions 5.4.0 through 5.7.1, leverage registered Smarty modifiers including unserialize and file_get_contents to write a webshell to the web root and execute arbitrary commands as the web server user.

Affected

jtl_shop >= 5.2.0 < 5.4.0
jtl_shop >= 5.4.0 < 5.5.4
jtl_shop >= 5.6.0 < 5.6.2
jtl_shop >= 5.7.0 < 5.7.2

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org#exploit-available

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CVE-2026-54390Critical· 9.8▾ AbyssalPoC available

JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer

▾ Abyssal zone — Critical with a public exploit or in-the-wild use

Depth score66/ 100 · Elevated

impact 53.9 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Jun 18, 2026

Updated

Oct 29, 2026

CVSS

9.8

Vendor

JTL Software

Product

JTL Shop

CWE

CWE-1336

Depth score

66 · Elevated

EPSS

0.60% · p49

Platforms

—

Source

CVEORG

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit availability

Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.

checked 2026-11-03

GitHub PoCs

1 public repository

shinthink/CVE-2026-54390 ↗

CISA SSVC

decided 2026-06-22

Exploitation: none
Automatable: yes
Technical impact: total

EPSS history

Exploit-prediction probability, daily snapshots since Nov 3.

0.6% → 0.6%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 138 days

Jun 18, 2026Published
Disclosed via CVEORG
Oct 29, 2026Record revised
Last analysed / modified upstream
Nov 3, 2026EPSS first tracked
0.6%
Nov 3, 2026Public exploit observed
1 GitHub repo (last check)

JTL Software CWE-1336 #cve.org #exploit-available

Affected

jtl_shop >= 5.2.0 < 5.4.0
jtl_shop >= 5.4.0 < 5.5.4
jtl_shop >= 5.6.0 < 5.6.2
jtl_shop >= 5.7.0 < 5.7.2

Full technical detail▾

Overview

Affected

jtl_shop >= 5.2.0 < 5.4.0
jtl_shop >= 5.4.0 < 5.5.4
jtl_shop >= 5.6.0 < 5.6.2
jtl_shop >= 5.7.0 < 5.7.2

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org#exploit-available