CVE-2026-35029
A user who is already authenticated into the platform can then use this endpoint to modify proxy configuration and environment variables, register custom pass-through endpoint handlers pointing to attacker-controlled Python code, achieving remote code…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 25.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.0, the /config/update endpoint does not enforce admin role authorization. A user who is already authenticated into the platform can then use this endpoint to modify proxy configuration and environment variables, register custom pass-through endpoint handlers pointing to attacker-controlled Python code, achieving remote code execution, read arbitrary server files by setting UI_LOGO_PATH and fetching via /get_image, and take over other privileged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables. Fixed in v1.83.0.
- CVSS 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 25.07% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863, CWE-425
- Affected
- litellm/litellm
- Source
- security-advisories@github.com
References
- https://github.com/BerriAI/litellm/security/advisories/GHSA-53mr-6c8q-9789Mitigation, Vendor Advisory
- http://seclists.org/fulldisclosure/2026/Apr/17
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:28960
- https://access.redhat.com/errata/RHSA-2026:30056
- https://access.redhat.com/security/cve/CVE-2026-35029
- https://bugzilla.redhat.com/show_bug.cgi?id=2455474
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35029.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.