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Fencer Vulns
high 8.2

CVE-2023-45539 json

HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have uns…

published 2023-11-28 2 y ago modified 2026-09-08 2 mo ago also BIT-haproxy-2023-45539 , EUVD-2023-49831

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.

Patch / fix

  • bitnami haproxy 2.8.2
  • haproxy haproxy 2.8.2
  • haproxy Debian 12 2.6.12-1+deb12u1
  • haproxy Debian 14, Debian 13 2.6.15-1

debian advisories DEBIAN-CVE-2023-45539

  • haproxy Ubuntu 20.04 LTS 2.0.31-0ubuntu0.3
  • haproxy Ubuntu 22.04 LTS 2.4.22-0ubuntu0.22.04.3
  • haproxy Ubuntu Pro 16.04 LTS 1.6.3-1ubuntu0.3+esm1
  • haproxy Ubuntu Pro 18.04 LTS 1.8.8-1ubuntu0.13+esm2

ubuntu advisories UBUNTU-CVE-2023-45539

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

  • haproxy RHEL 8 1.8.27-5.el8_10.1
  • podman openshift 4.15 3:4.4.1-26.2.rhaos4.15.el8
  • podman openshift 4.15 3:4.4.1-26.2.rhaos4.15.el9
  • haproxy openshift 4.15 2.6.13-4.rhaos4.15.el8
  • haproxy26 openshift 4.15 2.6.13-4.rhaos4.15.el8
  • podman-tests openshift 4.15 3:4.4.1-26.2.rhaos4.15.el8
  • podman-tests openshift 4.15 3:4.4.1-26.2.rhaos4.15.el9
  • podman-docker openshift 4.15 3:4.4.1-26.2.rhaos4.15.el8

red hat advisories RHSA-2024:10271RHSA-2024:10267RHSA-2024:9945RHSA-2024:8849RHSA-2024:8874RHSA-2024:4853

  • haproxy SLE Micro 5.5, SLE Micro 5.4, SLE Micro 5.3 +6 more 2.4.22+git0.f8e3218e2-150400.3.19.1
  • haproxy SLE High Availability Extension 15 SP1 2.0.31-150100.8.34.1
  • haproxy SLE High Availability Extension 15 SP3, SLE High Availability Extension 15 SP2 2.0.31-150200.11.26.1

suse advisories SUSE-SU-2024:2377-1SUSE-SU-2023:4647-1SUSE-SU-2023:4646-1SUSE-SU-2023:4645-1

  • haproxy AlmaLinux 8 1.8.27-5.el8_10.1
  • haproxy AlmaLinux 9 2.4.22-3.el9_3

almalinux advisories ALSA-2024:8849ALSA-2024:1142

  • haproxy Rocky Linux 8 1.8.27-5.el8_10.1

rocky linux advisories RLSA-2024:8849

  • haproxy CBL-Mariner 2.0 2.4.24-1

azure linux advisories AZL-32061

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2023-45539 updated cvss 5.3

haproxy: untrimmed URI fragments may lead to exposure of confidential data on static servers

  • Red Hat Ceph Storage 5 haproxy, haproxy22
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) haproxy 1.8.27-5.el8_10.1
    fixed: vendor fix RHSA-2024:8849
  • Red Hat Enterprise Linux AppStream (v. 9) haproxy 2.4.22-3.el9_3
    fixed: vendor fix RHSA-2024:1142
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) haproxy 1.8.23-3.el8_2.1
    fixed: vendor fix RHSA-2024:9945
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) haproxy 1.8.27-2.el8_4.1
    fixed: vendor fix RHSA-2024:10271
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) haproxy 1.8.27-4.el8_6.1
    fixed: vendor fix RHSA-2024:8874
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) haproxy 1.8.27-2.el8_4.1
    fixed: vendor fix RHSA-2024:10271
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) haproxy 1.8.27-4.el8_6.1
    fixed: vendor fix RHSA-2024:8874
show 7 more
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) haproxy 1.8.27-5.el8_8.1
    fixed: vendor fix RHSA-2024:10267
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) haproxy 2.4.17-6.el9_2.2
    fixed: vendor fix RHSA-2024:1089
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) haproxy 1.8.27-2.el8_4.1
    fixed: vendor fix RHSA-2024:10271
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) haproxy 1.8.27-4.el8_6.1
    fixed: vendor fix RHSA-2024:8874
  • Red Hat OpenShift Container Platform 4.14 haproxy 2.6.13-4.rhaos4.14.el8, haproxy26 2.6.13-4.rhaos4.14.el8
    fixed: vendor fix RHSA-2024:6412
  • Red Hat OpenShift Container Platform 4.15 haproxy 2.6.13-4.rhaos4.15.el8, haproxy26 2.6.13-4.rhaos4.15.el8
    fixed: vendor fix RHSA-2024:4853
  • Red Hat OpenShift Container Platform 4.14 cri-o 1.27.8-6.rhaos4.14.git06fccaa.el8, cri-o 1.27.8-6.rhaos4.14.git06fccaa.el9, openshift 4.14.0-202409041843.p0.g03a907c.assembly.stream.el8, openshift 4.14.0-202409041843.p0.g03a907c.assembly.stream.el9, openshift-ansible 4.14.0-202408291409.p0.g0a97acb.assembly.stream.el8, openshift-ansible 4.14.0-202408291409.p0.g0a97acb.assembly.stream.el9, +6 more Red Hat OpenShift Container Platform 4.15 podman 4.4.1-26.2.rhaos4.15.el8, podman 4.4.1-26.2.rhaos4.15.el9, podman-tests 4.4.1-26.2.rhaos4.15.el8, podman-tests 4.4.1-26.2.rhaos4.15.el9, podman-docker 4.4.1-26.2.rhaos4.15.el8, podman-docker 4.4.1-26.2.rhaos4.15.el9, +7 more
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.51% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
NVD 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
OSV 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami haproxy
<2.8.2
2.8.2

Classification

Weakness
  • CWE-116 Improper Encoding or Escaping of Output

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.