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Fencer Vulns
medium 6.4

CVE-2025-59303 json

HAProxy Kubernetes Ingress Controller before 3.1.13, when the config-snippets feature flag is used, accepts config snippets from users with…

published 2025-10-08 13 mo ago modified 2026-10-08 32 d ago also EUVD-2025-33296

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

HAProxy Kubernetes Ingress Controller before 3.1.13, when the config-snippets feature flag is used, accepts config snippets from users with create/update permissions. This can result in obtaining an ingress token secret as a response. The fixed versions of HAProxy Enterprise Kubernetes Ingress Controller are 3.0.16-ee1, 1.11.13-ee1, and 1.9.15-ee1.

Patch / fix

  • HAProxy HAProxy Kubernetes Ingress Controller 3.1.13

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-59303 updated cvss 8.5

haproxy: HAProxy Kubernetes Ingress Controller: Secret Leak via Config Snippets

  • Red Hat Ceph Storage 5 haproxy, haproxy22
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 haproxy Red Hat Enterprise Linux 8 haproxy Red Hat Enterprise Linux 9 haproxy Red Hat Enterprise Linux 10 haproxy
    affected: workaround, no fix available
  • Red Hat Hardened Images haproxy
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 haproxy, haproxy18, haproxy20, haproxy22, haproxy26, haproxy28
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Affected products

  • HAProxy HAProxy Kubernetes Ingress Controller

Classification

Weakness
  • CWE-791 Incomplete Filtering of Special Elements

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.