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TI-2021-16625 Aliases CVE-2021-39240GHSA-88gq-424p-x3xc

An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before…

Priority LOW 37Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.

Why it matters now

EPSS 0.0221 82nd percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*2.2.0 to before 2.2.16; 2.3.0 to before 2.3.13; 2.4.0 to before 2.4.3VulnerableHAProxy
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
  • cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* Versions 2.2.0 to before 2.2.16; 2.3.0 to before 2.3.13; 2.4.0 to before 2.4.3 Vulnerable ·HAProxy
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Red Hat 2 advisories

  • RHSA-2021:5208 Released 2022-01-05 · Red Hat rating Moderate
    OpenShift Container Platform 4.8.25 security update
    • Red Hat OpenShift Container Platform 4.8 haproxy-2.2.13-2.el7, haproxy-2.2.13-2.el8
  • RHSA-2021:4118 Released 2021-11-10 · Red Hat rating Moderate
    OpenShift Container Platform 4.9.6 packages and security update
    • Red Hat OpenShift Container Platform 4.9 haproxy-2.2.15-2.el8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 3.11AffectedNo fix planned: Out of support scope
Red Hat OpenShift Container Platform 4.8Fixed RHSA-2021:5208
Red Hat OpenShift Container Platform 4.9Fixed RHSA-2021:4118
Not affected: 7 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4.8
  • Red Hat OpenShift Container Platform 4.9
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39240
  2. 2026-10-03 Alias added: GHSA-88gq-424p-x3xc

References

Advisory 3

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences