CVE-2026-40217

highpriority · track · 15EPSS 0.155 · 97 %ileexploit · PoCDEEURUUS
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
1 exploit · PoC
Likely / severe?
15.5% (97th) EPSS
CVSS 8.8 · high
Is it mine?
8 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-26

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

01

cvss

Technical severity, 0–10. One row per scoring source.

8.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · cve@mitre.org USexploitability 2.8 · impact 5.9
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-420USCWE-420USCWE-420USCWE-913USCWE-94USCWE-94US
04

exploits (1)

Public proof-of-concept and weaponised exploit code.

05

affected products (8)

Products and version ranges known to be affected.

06

advisories (3)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-1408LiteLLM: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit AdministratorrechtenDeutsch2026-05-06csaf · cert_bundDE

    Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in LiteLLM ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen.

  • GHSA-wxxx-gvqv-xp7pLiteLLM has a sandbox escape in custom-code guardrail2026-05-11ghsa · osvUS

    ### Impact The `POST /guardrails/test_custom_code` endpoint runs user-supplied Python inside a hand-rolled sandbox. The sandbox can be escaped using bytecode-level techniques, allowing arbitrary code execution in the proxy process — which runs as root in the default Docker image. **Reaching the endpoint requires a proxy-admin credential** in default configurations. ### Patches Fixed in **`1.83.11`**. The hand-rolled sandbox has been replaced with `RestrictedPython`. Upgrade to `1.83.11` or later. ### Workarounds If upgrading is not immediately possible, block `POST /guardrails/test_custom_code` at your reverse proxy or API gateway. ### References - Patched release: [`v1.83.10-stable`](https://github.com/BerriAI/litellm/releases/tag/v1.83.10-stable)

  • PYSEC-2026-2601LiteLLM has a sandbox escape in custom-code guardrail2026-07-13vendor · osvUS

    ### Impact The `POST /guardrails/test_custom_code` endpoint runs user-supplied Python inside a hand-rolled sandbox. The sandbox can be escaped using bytecode-level techniques, allowing arbitrary code execution in the proxy process — which runs as root in the default Docker image. **Reaching the endpoint requires a proxy-admin credential** in default configurations. ### Patches Fixed in **`1.83.11`**. The hand-rolled sandbox has been replaced with `RestrictedPython`. Upgrade to `1.83.11` or later. ### Workarounds If upgrading is not immediately possible, block `POST /guardrails/test_custom_code` at your reverse proxy or API gateway. ### References - Patched release: [`v1.83.10-stable`](https://github.com/BerriAI/litellm/releases/tag/v1.83.10-stable)

07

also known as (8)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvcert_bundnvdNVDCVE.orgMITRE
published 2026-04-10modified 2026-10-26
09

references (9)

External citations — patches, advisories, analysis.

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