CVE-2026-31236

Name	CVE-2026-31236
Description	The llm CLI tool thru 0.27.1 contains a critical code injection vulnerability via its --functions command-line argument. This argument is intended to allow users to provide custom Python function definitions. However, the tool directly executes the provided code using the unsafe exec() function without any sanitization, sandboxing, or security restrictions. An attacker can exploit this by crafting a malicious llm command with arbitrary Python code in the --functions argument and using social engineering to trick a victim into running it. This leads to arbitrary code execution on the victim's system, potentially granting the attacker full control.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
llm (PTS)	trixie/contrib	0.23-1	vulnerable
	forky, sid	0.30-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
llm	source	(unstable)	(unfixed)

Notes

[trixie] - llm <no-dsa> (Minor issue)
https://www.notion.so/CVE-2026-31236-35d1e139318881a4a0f1fffcf671f7e3
https://github.com/simonw/llm/security/advisories/GHSA-g52p-p8pm-jjw6