UBUNTU-CVE-2026-115822

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Source
https://ubuntu.com/security/CVE-2026-115822
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-115822
Upstream
Published
2026-10-26T00:00:00Z
Modified
2026-10-27T04:17:49Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. Starman decodes chunked request bodies before calling the application, matching each chunk-size line with s/^(([0-9a-fA-F]+).*\015\012)//. A line of hex digits followed by a bare LF and then CRLF never matches, because . does not match LF, and each failed attempt backtracks in time quadratic in the length of the hex run. Nothing limits the length of the line. A remote attacker can exhaust worker CPU by sending such requests to any route.

References

Affected packages

Ubuntu:16.04:LTS
starman

Package

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

Affected ranges

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

Affected versions

0.*
0.4014-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4014-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"
Ubuntu:18.04:LTS
starman

Package

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

Affected ranges

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

Affected versions

0.*
0.4014-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4014-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"
Ubuntu:20.04:LTS
starman

Package

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

Affected ranges

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

Affected versions

0.*
0.4014-3
0.4015-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4015-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"
Ubuntu:22.04:LTS
starman

Package

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

Affected ranges

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

Affected versions

0.*
0.4015-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4015-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"
Ubuntu:24.04:LTS
starman

Package

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

Affected ranges

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

Affected versions

0.*
0.4016-1
0.4017-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4017-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"
Ubuntu:26.04:LTS
starman

Package

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

Affected ranges

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

Affected versions

0.*
0.4017-1
0.4017-1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4017-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"
Ubuntu:26.10
starman

Package

Name
starman
Purl
pkg:deb/ubuntu/starman?arch=source&distro=stonking

Affected ranges

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

Affected versions

0.*
0.4017-1build1
0.4018-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "starman",
            "binary_version":  "0.4018-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115822.json"