ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-103528

Thelia 2.6.0 uses Smarty for email templates without properly restricting access to dangerous PHP functions.

Published Oct 12, 2026 · catalog updated Oct 15, 2026 · CERT/CC

Check if you run it

No confirmed exploitation is on record for CVE-2026-103528. EPSS is 0.39%. Act only if a listed version of CERT/CC is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.39%
Remediation
Not established
Affected products
CERT/CC

Thelia 2.6.0 uses Smarty for email templates without properly restricting access to dangerous PHP functions. An authenticated administrator can inject malicious Smarty expressions into email templates via the messages configuration interface, and when the template is previewed or rendered, functions such as system(), exec(), file_put_contents(), and file_get_contents() can be executed with the privileges of the web process. This allows arbitrary OS command execution, file read/write operations, and RCE on the underlying server.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-103528

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-103528. EPSS is 0.39%. Act only if a listed version of CERT/CC is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine. EPSS 0.39%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · CERT/CC Vulnerability Notes

    Detected

    Overview Thelia versions 2.6.0 and 2.6.1 contain multiple vulnerabilities relating to file management, Smarty templating, module installation, and administrative workflows. Successful exploitation of these issues could enable remote code execution (RCE), server-side template injection (SSTI), stored and reflected cross-site scripting (XSS), unauthorized URL redirection, and other risks that expose

  2. Oct 15, 2026 · NIST NVD

    Updated

    Thelia 2.6.0 uses Smarty for email templates without properly restricting access to dangerous PHP functions. An authenticated administrator can inject malicious Smarty expressions into email templates via the messages configuration interface, and when the template is previewed or rendered, functions such as system(), exec(), file_put_contents(), and file_get_contents() can be executed with the pri

Sources

  • CERT/CC Vulnerability NotesGovernment advisoryCVE-2026-103528

    Overview Thelia versions 2.6.0 and 2.6.1 contain multiple vulnerabilities relating to file management, Smarty templating, module installation, and administrative workflows. Successful exploitation of these issues could enable remote code execution (RCE), server-side template inje

    kb.cert.org
  • CVE.orgVulnerability recordCVE-2026-103528

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-103528

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-103528

    Thelia 2.6.0 uses Smarty for email templates without properly restricting access to dangerous PHP functions. An authenticated administrator can inject malicious Smarty expressions into email templates via the messages configuration interface, and when the template is previewed or

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.