CVE-2026-40217
83Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 8.8epss 15%
from disclosure to weapon39 days
Published on NVDApr 10
1st PoC+39d
VulnCheck+111d
exploitation probability
15%top 3% of all CVEs
observed exploitation
yesVulnCheck
3 public exploit(s)
LiteLLM through 2026-04-08 allows remote attackers to execute arbitrary code via bytecode rewriting at the /guardrails/test_custom_code URI.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
BerriAI · LiteLLMpublic PoCs found — 3
githubgithub.com/learner202649/CVE-2026-40217-PoC★ 0vulncheckvulncheck.com/xdb/ca56f7434d6bunverifiedvulncheckvulncheck.com/xdb/ea5c3b98bcaaunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://access.redhat.com/errata/RHSA-2026:24866https://access.redhat.com/errata/RHSA-2026:30056https://access.redhat.com/security/cve/CVE-2026-40217https://bugzilla.redhat.com/show_bug.cgi?id=2457301https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40217.jsonhttps://www.x41-dsec.de/lab/advisories/x41-2026-001-litellm/