Authenticated SSRF via unvalidated OAuth token URL
Published Jun 21, 2026 · Updated Jun 21, 2026
SSRF in BerriAI LiteLLM 1.82.0 through 1.82.2 allows remote authenticated users to send HTTP POST requests through the proxy. The _execute_with_mcp_client handler infers client-credentials OAuth from request fields, then _fetch_token posts to the supplied token_url without validation or an allowlist. A valid proxy API key reaches the connection-test endpoint, enabling internal service probing and state-changing requests where targets lack authentication.
Summary
What happened
SSRF in BerriAI LiteLLM 1.82.0 through 1.82.2 allows remote authenticated users to send HTTP POST requests through the proxy. The _execute_with_mcp_client handler infers client-credentials OAuth from request fields, then _fetch_token posts to the supplied token_url without validation or an allowlist. A valid proxy API key reaches the connection-test endpoint, enabling internal service probing and state-changing requests where targets lack authentication.
The record
- CVE
- CVE-2026-12774
- Published
- Jun 21, 2026
- Updated
- Jun 21, 2026
- Vendor
- Berri AI
- Product
- LiteLLM
- Classifications
- CWE-918, T1090
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 21, 2026CVE publishedPublication date reported by the CVE source.
- Jun 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.82.0
- Affected versionversion=1.82.1
- Affected versionversion=1.82.2
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- MCP token_url SSRF proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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