BIT-HAPROXY-2026-33555

An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be...

PT-2026-55077

An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be...

BIT-HAPROXY-2026-55204 HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...

HAProxy - Integer Overflow in FCGI Demux Record Length Field

...

HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

...

SUSE SLES15 Security Update : haproxy (SUSE-SU-2026:2652-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2652-1 advisory. This update for haproxy fixes the following issues - CVE-2026-55203: integer overflow vulnerability in the fcgiconn structure's drl field that...

SUSE SLES15 Security Update : haproxy (SUSE-SU-2026:2651-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2651-1 advisory. This update for haproxy fixes the following issues - CVE-2026-55203: integer overflow vulnerability in the fcgiconn structure's drl field that...

Security update for haproxy

This update for haproxy fixes the following issues CVE-2026-55203: integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as new FCGI record headers bsc1268557. CVE-2026-55204: null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl....

SUSE-SU-2026:2652-1 Security update for haproxy

This update for haproxy fixes the following issues - CVE-2026-55203: integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as new FCGI record headers bsc1268557. - CVE-2026-55204: null pointer dereference vulnerability in hpackdhtinsert within...

Security update for haproxy

This update for haproxy fixes the following issues CVE-2026-55203: integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as new FCGI record headers bsc1268557. CVE-2026-55204: null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl....

SUSE-SU-2026:2651-1 Security update for haproxy

This update for haproxy fixes the following issues - CVE-2026-55203: integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as new FCGI record headers bsc1268557. - CVE-2026-55204: null pointer dereference vulnerability in hpackdhtinsert within...

OESA-2026-2794 haproxy security update

HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world's most visited ones. Security Fixes: HAProxy through...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : HAProxy vulnerabilities (USN-8459-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8459-1 advisory. It was discovered that HAProxy incorrectly handled the FCGI demultiplexer record length field. A remote attacker could...

OPENSUSE-SU-2026:11090-1 haproxy-3.4.0+git31.fc300e9f2-1.1 on GA media

These are all security issues fixed in the haproxy-3.4.0+git31.fc300e9f2-1.1 package on the GA media of openSUSE Tumbleweed...

SUSE CVE-2026-55203

HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as new FCGI record headers. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record...

SUSE CVE-2026-55204

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...

Linux Distros Unpatched Vulnerability : CVE-2026-55204

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validat...

Linux Distros Unpatched Vulnerability : CVE-2026-55203

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as...

UBUNTU-CVE-2026-55203

HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgiconn structure's drl field that allows buffer misparse as new FCGI record headers. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record...

CVE-2026-55204

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...