CVE-2026-62996: Smarty Security stream restriction bypass through stream: resource

medium Affects smarty/smarty. Feed 2026.10.29.1, updated 2026-10-28; published 2026-08-07.

Smarty Security stream restriction bypass through stream: resource

Package: smarty/smarty Composer
Affected versions: >=5.0.0 and <5.8.4
Fixed in: 5.8.4
Severity: medium
Exploitation: not on CISA KEV · EPSS 1% (43.2th percentile)
Published: 2026-08-07
Source: osv.dev

References

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2021-26120 critical PHP Code Injection by malicious function name in smarty same package: smarty/smarty
CVE-2021-26119 high Sandbox escape through template_object in smarty same package: smarty/smarty
CVE-2022-29221 high PHP Code Injection by malicious block or filename in Smarty same package: smarty/smarty
CVE-2018-13982 high Smarty Path Traversal Vulnerability same package: smarty/smarty
CVE-2014-8350 high Smarty arbitrary PHP code execution same package: smarty/smarty
CVE-2017-1000480 critical Smarty PHP code injection same package: smarty/smarty