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CVE-2026-54390critical9.8

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

Impact

JTL Shop versions 5.2.0 through 5.7.1 have a server-side template injection vulnerability, allowing unauthenticated attackers to inject malicious template syntax due to unsanitized user input. This may allow reading sensitive server-side values or, on versions 5.4.0 through 5.7.1, writing a webshell to execute arbitrary commands. Attackers need no special access.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

JTL Software · VulnCheck

JTL Shop

8 ranges
VulnCheck version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

5.2.0 → before 5.4.0

semver versions

5.4.0 → before 5.5.4

semver versions

5.6.0 → before 5.6.2

semver versions

5.7.0 → before 5.7.2

semver versions

unaffected

5.0.0 → through 5.1.8

semver versions

5.5.4

semver versions

5.6.2

semver versions

5.7.2

semver versions

unknown

Other versions: affected

Original source description

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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-54390

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-1336 ↗

Improper Neutralization of Special Elements Used in a Template Engine

VulnCheck

Related →
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-29
CISA-ADP

Additional data publisher

2026-06-22

What changed

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References

3 sources
forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/
release-notesVulnCheck
sansec.io/research/jtl-shop-ssti-rce
technical-descriptionVulnCheck
www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer
third-party-advisoryVulnCheck