Vulnerability Report

CVE-2026-40217

RCE

Title: Remote Code Execution via Bytecode Rewriting

RCE

Proof Of Concept

PoC Available for CVE-2026-40217

CWE Category CWE-420
Published Date Apr 10, 2026
Modified Date Apr 27, 2026
Exploit Status Available
Score 8.8 CVSS v3.1
Exploit Probability (EPSS)
0.71%

Vulnerability Summary

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.

Impacted Vendors

L
litellm 1

Reference Links

https://www.x41-dsec.de/lab/advisories/x41-2026-001-litellm/
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-40217 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/learner202649/CVE-2026-40217-PoC
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.