CVE catalog

CVE-2021-39241

haproxy: CVE-2021-39241

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: Aug 17, 2021, 7:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.69% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	haproxy	sid	`3.2.26-1`	fixed
Debian	haproxy	forky	`3.2.26-1`	fixed
Debian	haproxy	trixie	`3.0.11-1+deb13u3`	fixed
Debian	haproxy	trixie-security	`3.0.11-1+deb13u4`	fixed
Debian	haproxy	bookworm	`2.6.12-1+deb12u3`	fixed
Debian	haproxy	bookworm-security	`2.6.12-1+deb12u4`	fixed
Ubuntu	haproxy	20.04	`2.0.5-1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.8-1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.9-1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.10-1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.10-1ubuntu1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.11-1ubuntu1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.12-1ubuntu2`	vulnerable
Ubuntu	haproxy	20.04	`2.0.13-1ubuntu2`	vulnerable
Ubuntu	haproxy	20.04	`2.0.13-2`	vulnerable
Ubuntu	haproxy	20.04	`2.0.13-2ubuntu0.1`	vulnerable
Ubuntu	haproxy	20.04	`2.0.13-2ubuntu0.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	haproxy	source	sid	`2.2.16-1`	not yet assigned	Not reported	Not reported
Debian	haproxy	source	forky	`2.2.16-1`	not yet assigned	Not reported	Not reported
Debian	haproxy	source	trixie	`2.2.16-1`	not yet assigned	Not reported	Not reported
Debian	haproxy	source	bookworm	`2.2.16-1`	not yet assigned	Not reported	Not reported
Ubuntu	haproxy	deb	20.04	`2.0.13-2ubuntu0.2`	Not reported	UBUNTU-CVE-2021-39241	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[haproxy]Unknown
Details (4)
- 2.6.12-1+deb12u3 · amd64 · bookworm
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · arm64 · bookworm
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · amd64 · bookworm-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · arm64 · bookworm-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
[haproxy-doc]Unknown
Source package: [haproxy]
Details (4)
- 2.6.12-1+deb12u3 · all · bookworm
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · all · bookworm
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · all · bookworm-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · all · bookworm-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
[vim-haproxy]Unknown
Source package: [haproxy]
Details (4)
- 2.6.12-1+deb12u3 · all · bookworm
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · all · bookworm
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · all · bookworm-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- 2.6.12-1+deb12u3 · all · bookworm-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12

[Debian 13 (Trixie)]

[haproxy]Unknown
Details (5)
- 3.0.11-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · arm64 · trixie-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
[haproxy-doc]Unknown
Source package: [haproxy]
Details (5)
- 3.0.11-1+deb13u3 · all · trixie
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · all · trixie
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · all · trixie-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · all · trixie-security · Historical version
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u4 · all · trixie-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
[vim-haproxy]Unknown
Source package: [haproxy]
Details (5)
- 3.0.11-1+deb13u3 · all · trixie
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · all · trixie
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · all · trixie-security · Historical version
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u3 · all · trixie-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13
- 3.0.11-1+deb13u4 · all · trixie-security
  Fixed · Fixed: 2.2.16-1
  dsa · haproxy · debian · 13

Observed: Oct 23, 2026, 6:01:56 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]