UBUNTU-CVE-2026-90678

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Source

https://ubuntu.com/security/CVE-2026-90678

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-90678

Upstream

CVE-2026-90678

Published

2026-09-14T00:00:00Z

Modified

2026-09-14T11:17:47Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer coding on a reused connection. Under those conditions, when an HTTP/3 request carries no Content-Length header, the HTTP/3 multiplexer credits the length declared in a DATA frame header to the stream endpoint's known-input-payload estimate at the moment the frame header is decoded, before the payload has been received, and that declared length is emitted verbatim as the HTTP/1.1 chunk size. A remote unauthenticated client that declares more payload than it delivers and then ends the stream causes HAProxy to announce a chunk larger than the bytes it writes and to return the connection to the idle pool in a desynchronized state. The result is potential HTTP request smuggling on reused backend connections: an attacker can place a request past a frontend rule such as a path-based http-request deny, so that the smuggled request is never seen by HAProxy's HTTP analysis, and can cause concurrent clients' requests, including their request lines and Authorization headers, to be consumed as the attacker's request body and lost. Exploitation is not deterministic; it depends on a race with backend connection pooling, succeeding in a majority of but not all trials during testing, and can be retried freely. The mechanism was introduced in 3.3-dev10; releases 3.2.x and earlier are unaffected.

References

Affected packages

Ubuntu:20.04:LTS

haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.5-1

2.0.8-1

2.0.9-1

2.0.10-1

2.0.10-1ubuntu1

2.0.11-1ubuntu1

2.0.12-1ubuntu2

2.0.13-1ubuntu2

2.0.13-2

2.0.13-2ubuntu0.1

2.0.13-2ubuntu0.2

2.0.13-2ubuntu0.3

2.0.13-2ubuntu0.5

2.0.29-0ubuntu1

2.0.29-0ubuntu1.1

2.0.29-0ubuntu1.3

2.0.31-0ubuntu0.1

2.0.31-0ubuntu0.2

2.0.31-0ubuntu0.3

2.0.33-0ubuntu0.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "haproxy",
            "binary_version": "2.0.33-0ubuntu0.1"
        },
        {
            "binary_name": "vim-haproxy",
            "binary_version": "2.0.33-0ubuntu0.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json"

Ubuntu:22.04:LTS

haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.9-2ubuntu2

2.4.8-1

2.4.8-2ubuntu3

2.4.11-1ubuntu1

2.4.12-1ubuntu1

2.4.12-1ubuntu2

2.4.13-1ubuntu1

2.4.14-1ubuntu1

2.4.18-0ubuntu1

2.4.18-0ubuntu1.1

2.4.18-0ubuntu1.2

2.4.18-0ubuntu1.3

2.4.22-0ubuntu0.22.04.1

2.4.22-0ubuntu0.22.04.2

2.4.22-0ubuntu0.22.04.3

2.4.24-0ubuntu0.22.04.1

2.4.24-0ubuntu0.22.04.2

2.4.24-0ubuntu0.22.04.3

2.4.29-0ubuntu0.22.04.1

2.4.30-0ubuntu0.22.04.1

2.4.30-0ubuntu0.22.04.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "haproxy",
            "binary_version": "2.4.30-0ubuntu0.22.04.2"
        },
        {
            "binary_name": "vim-haproxy",
            "binary_version": "2.4.30-0ubuntu0.22.04.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json"

Ubuntu:24.04:LTS

haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.6.15-1ubuntu2

2.8.5-1ubuntu1

2.8.5-1ubuntu2

2.8.5-1ubuntu3

2.8.5-1ubuntu3.1

2.8.5-1ubuntu3.2

2.8.5-1ubuntu3.3

2.8.5-1ubuntu3.4

2.8.15-0ubuntu0.24.04.1

2.8.16-0ubuntu0.24.04.1

2.8.16-0ubuntu0.24.04.2

2.8.16-0ubuntu0.24.04.3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "haproxy",
            "binary_version": "2.8.16-0ubuntu0.24.04.3"
        },
        {
            "binary_name": "vim-haproxy",
            "binary_version": "2.8.16-0ubuntu0.24.04.3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json"

Ubuntu:26.04:LTS

haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.10-1ubuntu3

3.2.9-1ubuntu1

3.2.9-1ubuntu2

3.2.9-1ubuntu2.1

3.2.9-1ubuntu2.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "haproxy",
            "binary_version": "3.2.9-1ubuntu2.2"
        },
        {
            "binary_name": "vim-haproxy",
            "binary_version": "3.2.9-1ubuntu2.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json"

Ubuntu:Pro:16.04:LTS

haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.5.14-1

1.5.15-1

1.6.2-1

1.6.2-2

1.6.2-2ubuntu1

1.6.2-2ubuntu3

1.6.3-1

1.6.3-1ubuntu0.1

1.6.3-1ubuntu0.2

1.6.3-1ubuntu0.3

1.6.3-1ubuntu0.3+esm1

1.6.3-1ubuntu0.3+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "haproxy",
            "binary_version": "1.6.3-1ubuntu0.3+esm2"
        },
        {
            "binary_name": "vim-haproxy",
            "binary_version": "1.6.3-1ubuntu0.3+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json"

Ubuntu:Pro:18.04:LTS

haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.7.9-1ubuntu1

1.7.9-1ubuntu2

1.8.4-1

1.8.7-1

1.8.8-1

1.8.8-1ubuntu0.1

1.8.8-1ubuntu0.2

1.8.8-1ubuntu0.3

1.8.8-1ubuntu0.4

1.8.8-1ubuntu0.6

1.8.8-1ubuntu0.7

1.8.8-1ubuntu0.8

1.8.8-1ubuntu0.9

1.8.8-1ubuntu0.10

1.8.8-1ubuntu0.11

1.8.8-1ubuntu0.13

1.8.8-1ubuntu0.13+esm2

1.8.8-1ubuntu0.13+esm3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "haproxy",
            "binary_version": "1.8.8-1ubuntu0.13+esm3"
        },
        {
            "binary_name": "vim-haproxy",
            "binary_version": "1.8.8-1ubuntu0.13+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90678.json"