CVE-2026-40217
A public proof of concept exists; no exploitation attested.
- Published2026-04-10
- WeaknessCWE-420 · CWE-94
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
LiteLLM through 2026-04-08 allows remote attackers to execute arbitrary code via bytecode rewriting at the /guardrails/test_custom_code URI.
Timeline
dates in UTC- 2026-04-1014:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-40217?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-40217?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2026.x | ≤ 2026-04-08 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
Fix
- Vendor fix Red Hat Product Security RHSA-2026:24866 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_ansible_automation_platform/2.6#Upgrade
- Workaround from the vendor Red Hat Product Security RHSA-2026:24866 · 114 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Advisories and patches
- www.x41-dsec.deMitigation
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
Sources
- NVDCVE recordread 2026-10-23
- CISA-ADPSSVC decisionpoc2026-06-15
- OpenCVESSVC decisionpoc—
- CNACVSS 3.18.8read 2026-10-23
- CNAweakness (CWE)CWE-420, CWE-94read 2026-10-23
- FIRST EPSSEPSS score3.4 %2026-10-22
- PoC-in-GitHubproof of concept1—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2026-04-10
- Last Modified
- 2026-07-15
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-40217?
Is CVE-2026-40217 actively exploited?
What is the CVSS score for CVE-2026-40217?
Running Red Hat Ansible Automation? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.