CVE-2026-42208Critical· 9.8▾ Hadal⚠ Exploited in the wild0dayPoC availableLiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.81.16 to before version 1.83.7, a database query used during proxy API key checks mixed the caller-supplied key value into the query tex…
▾ Hadal zone — Critical and actively exploited (CISA KEV / 0day)
impact 53.9 · likelihood 17.9 · exploitation 25
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 3 sources. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Jul 11.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Federal remediation due May 11, 2026
Last analysed / modified upstream
87%
87% → 89%
6 GitHub repos · Metasploit ×1 · Nuclei ×1
Added to the CISA catalog on May 8, 2026. Federal remediation due May 11, 2026. View catalog ↗
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.81.16 to before version 1.83.7, a database query used during proxy API key checks mixed the caller-supplied key value into the query text instead of passing it as a separate parameter. An unauthenticated attacker could send a specially crafted Authorization header to any LLM API route (for example POST /chat/completions) and reach this query through the proxy's error-handling path. An attacker could read data from the proxy's database and may be able to modify it, leading to unauthorised access to the proxy and the credentials it manages. This issue has been patched in version 1.83.7.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
litellm >= 1.81.16, < 1.83.7Patched in:
litellm 1.83.7Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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