CVE-2026-40217: LiteLLM through 2026-04-08 allows remote attackers to execute arbitrary code via bytecode rewriting at the /guardrails/test_custom_code URI

High severity · published Apr 10, 2026

CVE-2026-40217

LiteLLM through 2026-04-08 allows remote attackers to execute arbitrary code via bytecode rewriting at the /guardrails/test_custom_code URI

8.8

CVSS

15.5%

EPSS

On KEV

Description

LiteLLM through 2026-04-08 allows remote attackers to execute arbitrary code via bytecode rewriting at the /guardrails/test_custom_code URI.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)15.5% · higher than 97% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

LiteLLM · BerriAI

bb0639701796218a3447160e55c0f1097446e4e6085df7dfd39f476d4143743f · source: vendor, NVD

Lightspeed Core · Red Hat

All versions, or not specified · source: CISA

Red Hat Ansible Automation Platform 2.6 · Red Hat

All versions, or not specified · source: CISA

Red Hat OpenShift AI 3.3 · Red Hat

All versions, or not specified · source: CISA

Affected product

LiteLLM

BerriAI

All LiteLLM CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-40217

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-40217

Exploit

https://www.x41-dsec.de/lab/advisories/x41-2026-001-litellm/

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:24866

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:30056

access.redhat.com

https://access.redhat.com/security/cve/CVE-2026-40217

bugzilla.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2457301

security.access.redhat.com

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40217.json