CVE-2026-89032: BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass vulnerability in the semantic cache layer that al
Summary
BerriAI LiteLLM before version 1.101.0-rc.1 has a tenant isolation bypass vulnerability in its semantic cache layer (a system that stores and reuses AI responses based on meaning rather than exact text matching). Authenticated attackers with a valid virtual key can exploit a mismatch in how the system tracks which tenant owns cached data, allowing them to read other tenants' sensitive information like personal data or source code, and potentially trick AI systems into running malicious commands under someone else's account.
Solution / Mitigation
Update to BerriAI LiteLLM version 1.101.0-rc.1 or later.
Vulnerability Details
7.7(high)
EPSS: 0.0%
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
network
high
low
required
September 25, 2026
Classification
Affected Vendors
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Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-89032
First tracked: September 25, 2026 at 02:07 PM
Classified by LLM (prompt v3) · confidence: 92%