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CVE-2021-26120

PHP Code Injection by malicious function name

Severity
Critical 9.8
Published
21 Feb 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.1.39
Also known as
GHSA-3rpf-5rqv-689q
Sources
NVD, Project advisories (GitHub)

Description

Smarty before 3.1.39 allows code injection via an unexpected function name after a {function name= substring.

Affected software

SoftwareAffected versions
SmartyServers and applications · cpe:a:smarty:smarty
  • Every version before 3.1.39
SmartyServers and applications · github:smarty-php/smarty
  • Every version before 3.1.39

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-26120
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-26120
  • GitHub Advisory Database https://github.com/advisories/GHSA-3rpf-5rqv-689q
  • github.com https://github.com/smarty-php/smarty/security/advisories/GHSA-3rpf-5rqv-689q