TI-2021-16626 Aliases CVE-2021-39241 GHSA-6x47-wc8c-3q36

An issue was discovered in HAProxy 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before…

LOW 27Published 2021-08-17 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Partial Red Hat: 4 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 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. An HTTP method name may contain a space followed by the name of a protected resource. It is possible that a server would interpret this as a request for that protected resource, such as in the "GET /admin? HTTP/1.1 /static/images HTTP/1.1" example.

Why it matters now

EPSS 0.01687 77th percentileScored 2026-11-07

Fix Partial Red Hat: 4 advisoriesRed Hat: 4 fixed, 1 without a fix

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:haproxy:haproxy::::::::	2.0.0 to before 2.0.24; 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:::::::*	11.0	Vulnerable	Debian
cpe:2.3:o:fedoraproject:fedora:33:::::::*	33	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:::::::*	34	Vulnerable	Fedoraproject

cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* Versions 2.0.0 to before 2.0.24; 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 4 advisories

RHSA-2022:0114 Released 2022-01-19 · Red Hat rating Moderate
OpenShift Container Platform 4.7.41 security update
- Red Hat OpenShift Container Platform 4.7 haproxy-2.0.19-2.el7, haproxy-2.0.19-2.el8, haproxy20-2.0.19-2.el7 +1
RHSA-2022:0024 Released 2022-01-12 · Red Hat rating Moderate
OpenShift Container Platform 4.6.53 security update
- Red Hat OpenShift Container Platform 4.6 haproxy-2.0.16-2.el7, haproxy-2.0.16-4.el8, haproxy20-2.0.16-2.el7 +1
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

Show 1 more Red Hat advisories

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 →

Product	Status	Plan or fix
Red Hat OpenShift Container Platform 3.11	Affected	No fix planned: Out of support scope
Red Hat OpenShift Container Platform 4.6	Fixed	RHSA-2022:0024
Red Hat OpenShift Container Platform 4.7	Fixed	RHSA-2022:0114
Red Hat OpenShift Container Platform 4.8	Fixed	RHSA-2021:5208
Red Hat OpenShift Container Platform 4.9	Fixed	RHSA-2021:4118

Not affected: 9 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 4.6
Red Hat OpenShift Container Platform 4.7
Red Hat OpenShift Container Platform 4.8
Red Hat OpenShift Container Platform 4.9
Red Hat Software Collections

Timeline

2026-10-02 Threatist record created from CVE-2021-39241
2026-10-03 Alias added: GHSA-6x47-wc8c-3q36

References

Advisory 3

Other 2

Sources

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