gcdRadar
archive/Patch now/AIR-2025-0352
closedclosed 7 Oct 2025Patch now2 Disclosed vulnerabilityAI

CVE-2025-59425: vLLM vulnerable to timing attack at bearer auth

vLLM

API key validation in vLLM was vulnerable to a timing attack during string comparison. Attackers could potentially discover valid API keys more efficiently than brute force.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
7.5
EPSS
0.01 · top 53% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
7 Oct 2025
last update
7 Oct 2025
CVE ids
CVE-2025-59425other records

Timeline · 2

  1. 7 Oct 2025CVE-2025-59425: vLLM is vulnerable to timing attack at bearer auth
  2. 7 Oct 2025CVE-2025-59425: vLLM is an inference and serving engine for large language models (LLMs).

Sources · 2

Advisories and databases

  1. 2025-10-07
    CVE-2025-59425: vLLM is vulnerable to timing attack at bearer auth
    GitHub Advisory Database · github.com/advisories/GHSA-wr9h-g72x-mwhm
  2. 2025-10-07
    CVE-2025-59425: vLLM is an inference and serving engine for large language models (LLMs).
    NVD · nvd.nist.gov/vuln/detail/CVE-2025-59425

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
timing-attackvllm
dates
happened 7 Oct 2025 · first reported 7 Oct 2025
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2025-59425: vLLM vulnerable to timing attack at bearer auth

https://gcdradar.vercel.app/incidents/cve-2025-59425-vllm-vulnerable-to-timing-attack-at-bearer-au · AIR-2025-0352 · closed 2025-10-07

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2025-10-07
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2025-59425
- CVSS: 7.5

## Summary

API key validation in vLLM was vulnerable to a timing attack during string comparison. Attackers could potentially discover valid API keys more efficiently than brute force.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2025-10-07: CVE-2025-59425: vLLM is an inference and serving engine for large language models (LLMs). (https://nvd.nist.gov/vuln/detail/CVE-2025-59425)
- 2025-10-07: CVE-2025-59425: vLLM is vulnerable to timing attack at bearer auth (https://github.com/advisories/GHSA-wr9h-g72x-mwhm)

## Sources

- 2025-10-07 GitHub Advisory Database: CVE-2025-59425: vLLM is vulnerable to timing attack at bearer auth https://github.com/advisories/GHSA-wr9h-g72x-mwhm
- 2025-10-07 NVD: CVE-2025-59425: vLLM is an inference and serving engine for large language models (LLMs). https://nvd.nist.gov/vuln/detail/CVE-2025-59425

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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