CVE-2025-59303Network attack vector

Privilege escalation via injected HAProxy configuration

Published Oct 8, 2025 · Updated Oct 8, 2025

Configuration injection in HAProxy Kubernetes Ingress Controller before 3.1.13 allows remote authenticated users to obtain its token secret. The config-snippets feature accepts HAProxy directives from users allowed to create or modify Ingress or Service objects and lets HAProxy read sensitive Kubernetes service-account paths. Exposure requires config-snippets to be enabled; the stolen token grants access to cluster data available to the controller and supports privilege escalation.

CVSS severity6.4
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Configuration injection in HAProxy Kubernetes Ingress Controller before 3.1.13 allows remote authenticated users to obtain its token secret. The config-snippets feature accepts HAProxy directives from users allowed to create or modify Ingress or Service objects and lets HAProxy read sensitive Kubernetes service-account paths. Exposure requires config-snippets to be enabled; the stolen token grants access to cluster data available to the controller and supports privilege escalation.

The record

CVE
CVE-2025-59303
Published
Oct 8, 2025
Updated
Oct 8, 2025
Vendor
HAProxy Technologies
Product
HAProxy Kubernetes Ingress Controller
Classifications
CWE-791, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.1.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HAProxy Technologies · HAProxy Kubernetes Ingress Controllerversion=0 <3.1.13

Published CVSS scores

6.4MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-791Incomplete Filtering of Special Elements
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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