UBUNTU-CVE-2025-55702

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Source
https://ubuntu.com/security/CVE-2025-55702
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-55702.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-55702
Upstream
  • CVE-2025-55702
Published
2026-10-21T19:16:00Z
Modified
2026-10-28T20:16:12Z
Severity
  • 8.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
  • 7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

When a client sends a POST with Expect: 100-continue and the origin answers before reading the body, Apache Traffic Server parses the unread body left on the client connection as the next request. An attacker behind a front-end proxy that shares connections to Traffic Server can use this to smuggle requests past the front end and desynchronize responses for other users. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

References

Affected packages

Ubuntu:16.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.3.0-2ubuntu1
5.3.0-2ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "trafficserver",
            "binary_version": "5.3.0-2ubuntu2"
        },
        {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "5.3.0-2ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-55702.json"

Ubuntu:18.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.0.0-5
7.1.2+ds-2
7.1.2+ds-2build1
7.1.2+ds-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "trafficserver",
            "binary_version": "7.1.2+ds-3"
        },
        {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "7.1.2+ds-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-55702.json"

Ubuntu:Pro:20.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.0.5+ds-1
8.0.5+ds-2
8.0.5+ds-2build1
8.0.5+ds-2ubuntu1
8.0.5+ds-3
8.0.5+ds-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "trafficserver",
            "binary_version": "8.0.5+ds-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "8.0.5+ds-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-55702.json"

Ubuntu:Pro:22.04:LTS / trafficserver

Package

Name
trafficserver
Purl
pkg:deb/ubuntu/trafficserver?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.1.1+ds-1.1
9.*
9.1.1+ds-2build1
9.1.1+ds-2ubuntu0.1~esm1
9.1.1+ds-2ubuntu0.1
9.1.1+ds-2ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "trafficserver",
            "binary_version": "9.1.1+ds-2ubuntu0.1+esm1"
        },
        {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "9.1.1+ds-2ubuntu0.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-55702.json"

Ubuntu:24.04:LTS / trafficserver

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

9.*
9.2.1+ds-1build1
9.2.2+ds-1
9.2.3+ds-1
9.2.3+ds-1+deb12u1
9.2.3+ds-1+deb12u1build1
9.2.3+ds-1+deb12u1build3
9.2.3+ds-1+deb12u1build4
9.2.3+ds-1+deb12u1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "trafficserver",
            "binary_version": "9.2.3+ds-1+deb12u1ubuntu0.1"
        },
        {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "9.2.3+ds-1+deb12u1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-55702.json"