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CVE-2026-35029

LiteLLM affected by privilege escalation via unrestricted proxy configuration endpoint

8.7 HighPublic exploitFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

38.6%Up 38.3 points since Apr 7, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.7

LiteLLM affected by privilege escalation via unrestricted proxy configuration endpoint

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.

Record
CVE-2026-35029
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
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-863, CWE-425
Updated
2026-11-02
EUVDEUVD-2026-19370 8.7

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.

Record
EUVD-2026-19370
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
Updated
2026-11-02
GitHub AdvisoriesGHSA-53mr-6c8q-9789 8.7

LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint

Impact

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 do the following:

  • 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
  • Take over other priveleged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables

Patches

Fixed in v1.83.0. The endpoint now requires proxy_admin role.

Workarounds

Restrict API key distribution. There is no configuration-level workaround.

Record
GHSA-53mr-6c8q-9789
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
Weakness
CWE-863
Updated
2026-11-02
NVD 8.7

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.

Record
CVE-2026-35029
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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-863, CWE-425
Updated
2026-11-02
OSV 8.7

LiteLLM affected by privilege escalation via unrestricted proxy configuration endpoint

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.

Record
CVE-2026-35029
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
Weakness
CWE-863
Updated
2026-11-02
OSVGHSA-53mr-6c8q-9789 8.7

LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint

Impact

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 do the following:

  • 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
  • Take over other priveleged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables

Patches

Fixed in v1.83.0. The endpoint now requires proxy_admin role.

Workarounds

Restrict API key distribution. There is no configuration-level workaround.

Record
GHSA-53mr-6c8q-9789
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
Weakness
CWE-863
Updated
2026-11-02
OSVPYSEC-2026-2597 8.7

LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint

Impact

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 do the following:

  • 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
  • Take over other priveleged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables

Patches

Fixed in v1.83.0. The endpoint now requires proxy_admin role.

Workarounds

Restrict API key distribution. There is no configuration-level workaround.

Record
PYSEC-2026-2597
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
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
litellm
PyPI
 before 1.83.0
1.83.0
litellm
PyPI
 before 1.83.0, plus listed versions
0.1.00.1.10.1.20.1.2010.1.202
Show 45 moreShow less
0.1.2030.1.2040.1.2050.1.2060.1.2070.1.2080.1.2090.1.2100.1.2110.1.2120.1.2130.1.2140.1.2150.1.2160.1.2170.1.2180.1.2190.1.2200.1.2210.1.2220.1.2230.1.2240.1.2250.1.2260.1.2270.1.2280.1.2290.1.22910.1.2300.1.2310.1.2320.1.2330.1.2340.1.2350.1.2360.1.2370.1.2380.1.30.1.310.1.320.1.3300.1.3310.1.340.1.3410.1.343
1.83.0
litellm
PyPI
 before 1.83.0, plus listed versions
0.1.00.1.10.1.20.1.2010.1.202
Show 45 moreShow less
0.1.2030.1.2040.1.2050.1.2060.1.2070.1.2080.1.2090.1.2100.1.2110.1.2120.1.2130.1.2140.1.2150.1.2160.1.2170.1.2180.1.2190.1.2200.1.2210.1.2220.1.2230.1.2240.1.2250.1.2260.1.2270.1.2280.1.2290.1.22910.1.2300.1.2310.1.2320.1.2330.1.2340.1.2350.1.2360.1.2370.1.2380.1.30.1.310.1.320.1.3300.1.3310.1.340.1.3410.1.343
1.83.0

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
NucleiLiteLLM - Arbitrary File Read
PoC in GitHublearner202649/CVE-2026-35029-PoC2026-05-19

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, Nuclei, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-35029 is a high vulnerability (CVSS 8.7) in Berriai Litellm, published April 3, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 38.6%, the 98th percentile. Fixed in litellm 1.83.0.

References

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