HighGHSA-29gp-2c3m-3j6mCVE-2021-29454

Sandbox Escape by math function in smarty

Published 12 Jan 2022 · Updated 8 Jul 2026

Affected packages

smarty/smartyComposer

Affected: <3.1.42
Fixed in: 3.1.42

Update to the fixed version for your release line, for example:composer require smarty/smarty:^3.1.42

smarty/smartyComposer

Affected: >=4.0.0 <4.0.2
Fixed in: 4.0.2

Update to the fixed version for your release line, for example:composer require smarty/smarty:^4.0.2

Details

Impact

Template authors could run arbitrary PHP code by crafting a malicious math string. If a math string is passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string.

Patches

Please upgrade to 4.0.2 or 3.1.42 or higher.

References

See documentation on Math function.

For more information

If you have any questions or comments about this advisory please open an issue in the Smarty repo

Is GHSA-29gp-2c3m-3j6m in any of your client repos?

Checking one package by hand is fine. Checking it across forty client projects is not. NPMscan reads the lockfiles in every GitHub repo you pick, finds each project with an affected smarty/smarty, and gives you the command that fixes it.

Scan a project free, no signup Or connect GitHub to scan every repo

References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.