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CVE-2026-31236

CRITICAL
9.8
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-31236
State
PUBLISHED
Assigner
mitre
Reserved
2026-03-09 00:00 UTC
Published
2026-05-12 00:00 UTC
Last updated
2026-07-15 01:09 UTC
Primary CWE
CWE-94
CWE-94 Improper Control of Generation of Code ('Code Injecti…
Vendor / Product
n/a / n/a
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
n/a n/a — n/a
Weakness (CWE)
CWESourceDescription
— cna n/a
CWE-94 adp CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-94 adp Improper Control of Generation of Code ('Code Injection')
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3 HIGH 3.1 adp CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
References (2)
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