---
title: "CVE-2025-64513: Milvus Proxy has a Critical Authentication Bypass Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-64513/
description: "CVE-2025-64513 (github.com/milvus-io/milvus (Go)): Milvus is an open-source vector database built for generative AI applications. An unauthenticated…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-11-10
date_modified: 2025-11-13
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-64513"
kev: false
cvss: 9.3
epss: 0.00869
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-64513: Milvus Proxy has a Critical Authentication Bypass Vulnerability

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 58: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 58% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/milvus-io/milvus (Go) >= 0.10.4, < 2.4.24, fixed in 2.4.24 ; github.com/milvus-io/milvus (Go) >= 2.5.0, < 2.5.21, fixed in 2.5.21 ; github.com/milvus-io/milvus (Go) >= 2.6.0, < 2.6.5, fixed in 2.6.5 ; github.com/milvus-io/milvus (Go) < 0.10.3-0.20251107071934-6102f001a971, fixed in 0.10.3-0.20251107071934-6102f001a971 . Check your lockfile, including transitive dependencies.

## What it is

Milvus is an open-source vector database built for generative AI applications. An unauthenticated attacker can exploit a vulnerability in versions prior to 2.4.24, 2.5.21, and 2.6.5 to bypass all authentication mechanisms in the Milvus Proxy component, gaining full administrative access to the Milvus cluster. This grants the attacker the ability to read, modify, or delete data, and to perform privileged administrative operations such as database or collection management. This issue has been fixed in Milvus 2.4.24, 2.5.21, and 2.6.5. If immediate upgrade is not possible, a temporary mitigation can be applied by removing the sourceID header from all incoming requests at the gateway, API gateway, or load balancer level before they reach the Milvus Proxy. This prevents attackers from exploiting the authentication bypass behavior.

## Affected packages

- Go `github.com/milvus-io/milvus` >= 0.10.4, < 2.4.24 → fixed: 2.4.24
- Go `github.com/milvus-io/milvus` >= 2.5.0, < 2.5.21 → fixed: 2.5.21
- Go `github.com/milvus-io/milvus` >= 2.6.0, < 2.6.5 → fixed: 2.6.5
- Go `github.com/milvus-io/milvus` < 0.10.3-0.20251107071934-6102f001a971 → fixed: 0.10.3-0.20251107071934-6102f001a971

## Affected products (CVE record)

- milvus-io milvus: < 2.4.24, >= 2.5.0, < 2.5.21, >= 2.6.0, < 2.6.5

## Severity

- GitHub_M CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.87% probability of exploitation activity in the next 30 days; percentile 58.

## Sources

- [GitHub Advisory GHSA-mhjq-8c7m-3f7p](https://github.com/advisories/GHSA-mhjq-8c7m-3f7p)
- [CVE.org record CVE-2025-64513](https://www.cve.org/CVERecord?id=CVE-2025-64513)
- [NVD entry CVE-2025-64513](https://nvd.nist.gov/vuln/detail/CVE-2025-64513)
- [github.com](https://github.com/milvus-io/milvus/security/advisories/GHSA-mhjq-8c7m-3f7p)
- [github.com](https://github.com/milvus-io/milvus/pull/45379)
- [github.com](https://github.com/milvus-io/milvus/pull/45383)
- [github.com](https://github.com/milvus-io/milvus/pull/45391)
- [github.com](https://github.com/milvus-io/milvus/commit/6102f001a971c8c8055a4a4cae704442d5cab793)

---
Source page: https://erroneo.us/security/cve/CVE-2025-64513/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt