CVE-2026-35029
HighExploitedLiteLLM: Privilege escalation via unrestricted proxy configuration endpoint
Published Apr 3, 2026 · Updated Sep 10, 2026 · Also known as GHSA-53mr-6c8q-9789, PYSEC-2026-2597
Key Facts
Patch immediately- CVE-2026-35029 is a high-severity vulnerability (CVSS 8.7 v4) affecting Litellm, airflow-2 (chainguard), airflow-3 (chainguard) and 4 more products.
- It is exploited in the wild, listed in Industry KEV feed since Apr 6, 2026. No public exploit code is known.
- EPSS estimates a 4.0% probability of exploitation in the next 30 days.
- Fixed versions are available, including airflow-2 2.11.2-r7, airflow-3 3.1.8-r11, airflow-3 3.3.1-r0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
8.7
CVSS: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
EPSS (30-day exploit likelihood)
4.0%
Higher than 90.3% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
Get the full CVE-2026-35029 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Apr 6, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
13 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| LitellmLitellm | >= < 1.83.0 | 1.83.0 |
| airflow-2chainguard | See advisory | 2.11.2-r7 |
| airflow-3chainguard | See advisory | 3.1.8-r11 |
| ansible-automation-platformredhat | See advisory | 26/lightspeed-chatbot-rhel9:1777398576 |
| rhoai/odh-llama-stack-core-rhel9:1781826406redhat | See advisory | n/a |
Patched Releases
airflow-2
2.11.2-r7
airflow-3
3.1.8-r11, 3.3.1-r0
ansible-automation-platform
26/lightspeed-chatbot-rhel9:1777398576
Litellm
1.80.11+sp999, 1.83.0, 1.83.3.0-r0
seal-litellm
1.80.11+sp999
Timeline
Publicly disclosed
Apr 3, 2026
Added to Industry KEV feed
Apr 6, 2026
Last updated
Sep 10, 2026
Weakness Type
- CWE-425 Direct Request ('Forced Browsing')
- CWE-863 Incorrect Authorization
References
- advisoryRHSA-2026:13545
- advisoryRHSA-2026:28960
- advisoryRHSA-2026:30056
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35029.json
FAQ
Common Questions.
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format.
Affected: Litellm versions >= < 1.83.0; airflow-2 (chainguard); airflow-3 (chainguard), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Apr 6, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including airflow-2 2.11.2-r7, airflow-3 3.1.8-r11, airflow-3 3.3.1-r0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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