HighVulnerabilityLLM-specific

CVE-2026-116176: vLLM server-side request forgery via X-Request-Id decode address

Source: NVD(opens in a new tab)
Identifier: CVE-2026-116176
Published: October 25, 2026
Record updated: October 25, 2026

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

Summary

vLLM versions from 0.9.2 before 0.24.0 contain a server-side request forgery flaw. API callers can embed a decode address in the X-Request-Id header to force outbound connections. An attacker can make a P2pNcclConnector prefill worker ZMQ-connect to an attacker-controlled host, leaking the NCCL unique_id and KV-cache tensors or blocking the worker.

Mitigation

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

Details

Scores and exploitation

CVSS score: 8.2(high)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Attack vector: network
Attack complexity: low
Privileges required: none
User interaction: none
EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 25, 2026.
Disclosure date: October 25, 2026

Weaknesses and techniques

Weakness (CWE): CWE-918
Attack pattern (CAPEC): CAPEC-664

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Inference
Impact: Confidentiality,
Availability
Labels: security

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-2026-116176

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

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

Classifier confidence: 95% (self-assessed)

Topics

Inference infrastructure

Summary

Mitigation

Topics

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