OESA-2026-2794

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2794
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-2794.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-2794
Upstream
Published
2026-06-24T11:11:43Z
Modified
2026-08-18T01:21:12Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N CVSS Calculator
Summary
haproxy security update
Details

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 Fix(es):

HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn 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 consumption and allowing malicious FastCGI backends to desynchronize the FCGI framing parser, potentially causing request routing errors, response smuggling, or memory safety issues.(CVE-2026-55203)

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.(CVE-2026-55204)

Database specific 
{
    "severity": "High"
}
References

Affected packages

openEuler:20.03-LTS-SP4 / haproxy

Package

Name
haproxy
Purl
pkg:rpm/openEuler/haproxy&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2.16-10.oe2003sp4

Ecosystem specific 

{
    "aarch64": [
        "haproxy-2.2.16-10.oe2003sp4.aarch64.rpm",
        "haproxy-debuginfo-2.2.16-10.oe2003sp4.aarch64.rpm",
        "haproxy-debugsource-2.2.16-10.oe2003sp4.aarch64.rpm"
    ],
    "noarch": [
        "haproxy-help-2.2.16-10.oe2003sp4.noarch.rpm"
    ],
    "src": [
        "haproxy-2.2.16-10.oe2003sp4.src.rpm"
    ],
    "x86_64": [
        "haproxy-2.2.16-10.oe2003sp4.x86_64.rpm",
        "haproxy-debuginfo-2.2.16-10.oe2003sp4.x86_64.rpm",
        "haproxy-debugsource-2.2.16-10.oe2003sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2794.json"

openEuler:22.03-LTS-SP4 / haproxy

Package

Name
haproxy
Purl
pkg:rpm/openEuler/haproxy&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.6.6-20.oe2203sp4

Ecosystem specific 

{
    "aarch64": [
        "haproxy-2.6.6-20.oe2203sp4.aarch64.rpm",
        "haproxy-debuginfo-2.6.6-20.oe2203sp4.aarch64.rpm",
        "haproxy-debugsource-2.6.6-20.oe2203sp4.aarch64.rpm"
    ],
    "noarch": [
        "haproxy-help-2.6.6-20.oe2203sp4.noarch.rpm"
    ],
    "src": [
        "haproxy-2.6.6-20.oe2203sp4.src.rpm"
    ],
    "x86_64": [
        "haproxy-2.6.6-20.oe2203sp4.x86_64.rpm",
        "haproxy-debuginfo-2.6.6-20.oe2203sp4.x86_64.rpm",
        "haproxy-debugsource-2.6.6-20.oe2203sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2794.json"

openEuler:24.03-LTS-SP1 / haproxy

Package

Name
haproxy
Purl
pkg:rpm/openEuler/haproxy&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.5-14.oe2403sp1

Ecosystem specific 

{
    "aarch64": [
        "haproxy-2.9.5-14.oe2403sp1.aarch64.rpm",
        "haproxy-debuginfo-2.9.5-14.oe2403sp1.aarch64.rpm",
        "haproxy-debugsource-2.9.5-14.oe2403sp1.aarch64.rpm"
    ],
    "noarch": [
        "haproxy-help-2.9.5-14.oe2403sp1.noarch.rpm"
    ],
    "src": [
        "haproxy-2.9.5-14.oe2403sp1.src.rpm"
    ],
    "x86_64": [
        "haproxy-2.9.5-14.oe2403sp1.x86_64.rpm",
        "haproxy-debuginfo-2.9.5-14.oe2403sp1.x86_64.rpm",
        "haproxy-debugsource-2.9.5-14.oe2403sp1.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2794.json"

openEuler:24.03-LTS-SP3 / haproxy

Package

Name
haproxy
Purl
pkg:rpm/openEuler/haproxy&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.0.11-3.oe2403sp3

Ecosystem specific 

{
    "aarch64": [
        "haproxy-3.0.11-3.oe2403sp3.aarch64.rpm",
        "haproxy-debuginfo-3.0.11-3.oe2403sp3.aarch64.rpm",
        "haproxy-debugsource-3.0.11-3.oe2403sp3.aarch64.rpm"
    ],
    "noarch": [
        "haproxy-help-3.0.11-3.oe2403sp3.noarch.rpm"
    ],
    "src": [
        "haproxy-3.0.11-3.oe2403sp3.src.rpm"
    ],
    "x86_64": [
        "haproxy-3.0.11-3.oe2403sp3.x86_64.rpm",
        "haproxy-debuginfo-3.0.11-3.oe2403sp3.x86_64.rpm",
        "haproxy-debugsource-3.0.11-3.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2794.json"