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Fencer Vulns
medium 5.9

CVE-2018-11469 json

Incorrect caching of responses to requests including an Authorization header in HAProxy 1.8.0 through 1.8.9 (if cache enabled) allows attac…

published 2018-05-25 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-3500

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Incorrect caching of responses to requests including an Authorization header in HAProxy 1.8.0 through 1.8.9 (if cache enabled) allows attackers to achieve information disclosure via an unauthenticated remote request, related to the proto_http.c check_request_for_cacheability function.

Patch / fix

  • haproxy Debian 14, Debian 13, Debian 12 1.8.9-2

debian advisories DEBIAN-CVE-2018-11469

  • haproxy Ubuntu 18.04 LTS 1.8.8-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2018-11469

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rh-haproxy18-haproxy RHEL 3 SOFTWARE_COLLECTIONS 1.8.17-1.el7
  • rh-haproxy18-haproxy-syspaths RHEL 3 SOFTWARE_COLLECTIONS 1.8.17-1.el7

red hat advisories RHSA-2019:1436

  • haproxy SLE High Availability Extension 15 1.8.14~git0.52e4d43b-3.3.2

suse advisories SUSE-SU-2018:3249-1

  • haproxy openSUSE Tumbleweed 2.4.4+git0.acb1d0bea-1.2

opensuse advisories openSUSE-SU-2024:10839-1

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-2018-11469 updated cvss 7.5

haproxy: Information disclosure in check_request_for_cacheability function in proto_http.c

  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-haproxy18-haproxy 1.8.17-1.el7, rh-haproxy18-haproxy-syspaths 1.8.17-1.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-haproxy18-haproxy 1.8.17-1.el7, rh-haproxy18-haproxy-syspaths 1.8.17-1.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-haproxy18-haproxy 1.8.17-1.el7, rh-haproxy18-haproxy-syspaths 1.8.17-1.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-haproxy18-haproxy 1.8.17-1.el7, rh-haproxy18-haproxy-syspaths 1.8.17-1.el7 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-haproxy18-haproxy 1.8.17-1.el7, rh-haproxy18-haproxy-syspaths 1.8.17-1.el7
    fixed: vendor fix RHSA-2019:1436
  • Red Hat Enterprise Linux 6 haproxy Red Hat Enterprise Linux 7 haproxy Red Hat Enterprise Linux 8 haproxy Red Hat OpenShift Enterprise 3 haproxy, haproxy18
    not affected: vulnerable code 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

Exploit prediction

2.86% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.