UBUNTU-CVE-2026-55767

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Source
https://ubuntu.com/security/CVE-2026-55767
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55767.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55767
Upstream
Published
2026-06-23T16:17:00Z
Modified
2026-06-25T19:17:47.207254303Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, CookieJar incorrectly accepts cookies with a dot-only Domain attribute and whitespace-padded variants. SetCookie::matchesDomain() removes leading dots from the cookie domain, normalizing dot-only values to the empty string; SetCookie::validate() only rejected a strictly empty domain, so these cookies could be stored and the empty normalized domain was treated as matching any request host. An attacker-controlled origin that an application requests with a shared cookie jar can therefore set a cookie that Guzzle later sends to unrelated hosts using the same jar. This may allow cookie injection or session fixation against downstream services, depending on how those services interpret the injected cookie. This vulnerability is fixed in 7.12.1.

References

Affected packages

Ubuntu:24.04:LTS / guzzle

Package

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

Affected ranges

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

Affected versions

7.*
7.4.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-guzzlehttp-guzzle",
            "binary_version": "7.4.5-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55767.json"

Ubuntu:25.10 / guzzle

Package

Name
guzzle
Purl
pkg:deb/ubuntu/guzzle?arch=source&distro=questing

Affected ranges

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

Affected versions

7.*
7.9.2-0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-guzzlehttp-guzzle",
            "binary_version": "7.9.2-0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55767.json"

Ubuntu:26.04:LTS / guzzle

Package

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

Affected ranges

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

Affected versions

7.*
7.9.2-0.1
7.9.2-0.1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-guzzlehttp-guzzle",
            "binary_version": "7.9.2-0.1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55767.json"