CVE-2026-31236

Arbitrary code execution via unsafe exec call

Published May 12, 2026 · Updated May 12, 2026

Code injection in llm 0.27.1 and earlier allows context-dependent attackers to execute arbitrary code through a crafted --functions argument. The --functions option passes its Python function definition directly to exec() without validation, isolation, or sandboxing. A victim must run the attacker-supplied command, and the injected code executes with that user's operating-system privileges.

CVSS severity9.8
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in llm 0.27.1 and earlier allows context-dependent attackers to execute arbitrary code through a crafted --functions argument. The --functions option passes its Python function definition directly to exec() without validation, isolation, or sandboxing. A victim must run the attacker-supplied command, and the injected code executes with that user's operating-system privileges.

The record

CVE
CVE-2026-31236
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1204, T1059.006
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3Red Hat SADPCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1204User Execution
T1059.006Python

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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