Severe Twig Vulnerability Allows Arbitrary Code Execution in Ubuntu 26.04 LTS

Severe Twig Vulnerability Allows Arbitrary Code Execution in Ubuntu 26.04 LTS

First seen 9 Jun 2026, 02:56 UTC •UbuntuLinuxsecurity •90% similarity •72.0

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A critical vulnerability in the Twig template engine affects Ubuntu 26.04 LTS and its derivatives. Discovered on June 8, 2026, the flaw allows an authenticated user to execute arbitrary code by sending specially crafted network traffic. The issue arises from improper validation of PHP callables in Twig when using a source policy. Users are advised to update to php-twig version 3.23.0-2ubuntu0.1~esm1 to mitigate the risk. This vulnerability poses a significant threat to systems running affected versions of Ubuntu. A standard system update will also apply the necessary changes. Ubuntu Pro users benefit from extended security coverage for this issue. The vulnerability is tracked under USN-8408-1.

Key Points: • Twig vulnerability allows arbitrary code execution via crafted network traffic. • Affected systems include Ubuntu 26.04 LTS and its derivatives. • Users should update to php-twig version 3.23.0-2ubuntu0.1~esm1 to mitigate risks.

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Timeline

2026-06-08
Twig vulnerability discovered
The vulnerability allows authenticated users to execute arbitrary code due to improper validation of PHP callables.
Ubuntu
2026-06-09
Security advisory published
Linuxsecurity reports on the Twig vulnerability, urging users to update their systems to prevent exploitation.
Linuxsecurity

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Ubuntu Php-twig Twig Zero-day Exploit