---
id: CVE-2026-89032
title: >-
  BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass
  vulnerability in the semantic cache layer that allows authenticated users to
  read other tenants' cached responses by exploiting a metadata key mismatch
  between _get_s…
summary: >-
  BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass
  vulnerability in the semantic cache layer that allows authenticated users to
  read other tenants' cached responses by exploiting a metadata key mismatch
  between _get_s…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N'
cwe:
  - CWE-863
vendor: BerriAI
product: litellm
affected:
  - litellm < 1.101.0-rc.1
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T17:17:18.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89032'
references:
  - url: >-
      https://github.com/BerriAI/litellm/commit/16db51e2cfc28e02bd460481e634a8403ea9265e
    label: disclosure@vulncheck.com
  - url: 'https://github.com/BerriAI/litellm/pull/39590'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/BerriAI/litellm/releases/tag/v1.101.0-rc.1'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/berriai-litellm-rc-1-tenant-isolation-bypass-via-semantic-cache-layer
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T17:13:14.030Z'
---

## Overview

BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass vulnerability in the semantic cache layer that allows authenticated users to read other tenants' cached responses by exploiting a metadata key mismatch between _get_semantic_cache_tenant_scope() and _get_metadata_variable_name(). Attackers holding a valid virtual key can submit semantically similar prompts on affected routes such as /v1/responses and /bedrock/* to retrieve cached responses containing other tenants' personally identifiable information, financial data, or source code, and can cause agentic front-ends to auto-execute attacker-supplied tool calls under victim credentials by returning cached function_call or tool_calls payloads to a different principal.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.