Server-Side Request Forgery (SSRF) in Smarty - CVE-2026-62993
Published: July 21, 2026
Vulnerability identifier: #VU138906
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-62993
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Affected software:
Smarty
Smarty
Detailed vulnerability description
The vulnerability allows a remote user to perform server-side request forgery.
The vulnerability exists due to improper restriction of outbound requests in {fetch} when processing a remote URL that redirects from a trusted host to a non-trusted internal target. A remote user can supply a fetch target or influence one to perform server-side request forgery.
Exploitation requires an active security policy and an open redirect on a host permitted by the trusted_uri allowlist.
How to mitigate CVE-2026-62993
Install security update from vendor's website.