HighVulnerabilityLLM-specific

CVE-2026-89032: BerriAI LiteLLM tenant isolation bypass in semantic cache layer

Source: NVD(opens in a new tab)
Identifier: CVE-2026-89032
Published: September 25, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.3%

Summary

BerriAI LiteLLM versions before 1.101.0-rc.1 contain a tenant isolation bypass in the semantic cache layer, tracked as CVE-2026-89032. A metadata key mismatch between _get_semantic_cache_tenant_scope() and _get_metadata_variable_name() lets an authenticated user with a valid virtual key submit semantically similar prompts on routes such as /v1/responses and /bedrock/* and retrieve other tenants' cached responses, including personally identifiable information, financial data or source code. Attackers can also cause agentic front-ends to auto-execute attacker-supplied tool calls under victim credentials.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 7.7(high)
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack vector: network
Attack complexity: high
Privileges required: low
User interaction: required
EPSS: 0.3%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 10, 2026.
Disclosure date: September 25, 2026

Weaknesses and techniques

Weakness (CWE): CWE-863
Attack pattern (CAPEC): CAPEC-122

Classification

Attack type: PII leakage,
Other
Attack sophistication: Moderate
AI component targeted: API
Impact: Confidentiality,
Integrity
Labels: security,
privacy

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-89032

First tracked: September 25, 2026 at 02:07 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 95% (self-assessed)

Summary

Mitigation

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