gcdRadar
archive/Patch now/AIR-2026-0784
closedclosed 21 Jun 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-12773: LiteLLM MCP Proxy Has Improper Authentication

LiteLLM

An authentication weakness in the LiteLLM MCP proxy component permits remote manipulation. No active exploitation has been confirmed.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
7.3
EPSS
0.01 · top 37% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
21 Jun 2026
last update
21 Jun 2026
CVE ids
CVE-2026-12773other records

Timeline · 2

  1. 21 Jun 2026CVE-2026-12773: LiteLLM: MCP Proxy Has Improper Authentication
  2. 21 Jun 2026CVE-2026-12773: A weakness has been identified in BerriAI litellm up to 1.59.8.

Sources · 2

Advisories and databases

  1. 2026-06-21
    CVE-2026-12773: LiteLLM: MCP Proxy Has Improper Authentication
    GitHub Advisory Database · github.com/advisories/GHSA-4jcj-7x88-m979
  2. 2026-06-21
    CVE-2026-12773: A weakness has been identified in BerriAI litellm up to 1.59.8.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-12773

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
litellmmcp
dates
happened 21 Jun 2026 · first reported 21 Jun 2026
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-12773: LiteLLM MCP Proxy Has Improper Authentication

https://gcdradar.vercel.app/incidents/cve-2026-12773-litellm-mcp-proxy-has-improper-authentication · AIR-2026-0784 · closed 2026-06-21

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-21
- AI role: Attack on AI
- Products: LiteLLM
- CVE ids: CVE-2026-12773
- CVSS: 7.3

## Summary

An authentication weakness in the LiteLLM MCP proxy component permits remote manipulation. No active exploitation has been confirmed.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-06-21: CVE-2026-12773: A weakness has been identified in BerriAI litellm up to 1.59.8. (https://nvd.nist.gov/vuln/detail/CVE-2026-12773)
- 2026-06-21: CVE-2026-12773: LiteLLM: MCP Proxy Has Improper Authentication (https://github.com/advisories/GHSA-4jcj-7x88-m979)

## Sources

- 2026-06-21 GitHub Advisory Database: CVE-2026-12773: LiteLLM: MCP Proxy Has Improper Authentication https://github.com/advisories/GHSA-4jcj-7x88-m979
- 2026-06-21 NVD: CVE-2026-12773: A weakness has been identified in BerriAI litellm up to 1.59.8. https://nvd.nist.gov/vuln/detail/CVE-2026-12773

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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