CVE catalog
CVE-2023-0836
haproxy: CVE-2023-0836
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.20% · Oct 25, 2026
An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way.
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 | 22.04 | 2.2.9-2ubuntu2 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.8-1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.8-2ubuntu3 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.11-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.12-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.12-1ubuntu2 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.13-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.14-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1.1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1.2 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1.3 | fixed |
| Ubuntu | haproxy | 22.04 | 2.2.9-2ubuntu2 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.8-1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.8-2ubuntu3 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.11-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.12-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.12-1ubuntu2 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.13-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.14-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1.1 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1.2 | vulnerable |
| Ubuntu | haproxy | 22.04 | 2.4.18-0ubuntu1.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | haproxy | source | sid | 2.6.8-1 | not yet assigned | Not reported | Not reported |
| Debian | haproxy | source | forky | 2.6.8-1 | not yet assigned | Not reported | Not reported |
| Debian | haproxy | source | trixie | 2.6.8-1 | not yet assigned | Not reported | Not reported |
| Debian | haproxy | source | bookworm | 2.6.8-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | haproxy | deb | 22.04 | 2.4.18-0ubuntu1.3 | Not reported | USN-5994-1 | Not reported |
| Ubuntu | haproxy | deb | 22.04 | 2.4.18-0ubuntu1.3 | Not reported | UBUNTU-CVE-2023-0836 | 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 · bookwormFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· arm64 · bookwormFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· amd64 · bookworm-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· arm64 · bookworm-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- [haproxy-doc]Unknown
Source package: [haproxy]
Details (4)
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- [vim-haproxy]Unknown
Source package: [haproxy]
Details (4)
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
[Debian 13 (Trixie)]
- [haproxy]Unknown
Details (5)
3.0.11-1+deb13u3· amd64 · trixieFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· arm64 · trixieFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· arm64 · trixie-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u4· amd64 · trixie-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
- [haproxy-doc]Unknown
Source package: [haproxy]
Details (5)
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-security · Historical versionFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u4· all · trixie-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
- [vim-haproxy]Unknown
Source package: [haproxy]
Details (5)
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-security · Historical versionFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
3.0.11-1+deb13u4· all · trixie-securityFixed · Fixed:
2.6.8-1dsa · haproxy · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2023_6496.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-0836]
- [https://osv.dev/vulnerability/DSA-5388-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-0836]
- [https://osv.dev/vulnerability/USN-5994-1]
- [https://security-tracker.debian.org/tracker/CVE-2023-0836]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-0836.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-0716.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]