DEBIAN-CVE-2026-55767
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.
DEBIAN-CVE-2026-55767
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-55767
guzzle
Source reference: /affected/0/package/name
- Affected versions
- 7.11.0-1
Source reference:
/affected/0/versions7.12.0-1Source reference:
/affected/0/versions7.12.1-1Source reference:
/affected/0/versions7.12.3-1Source reference:
/affected/0/versions7.13.1-1Source reference:
/affected/0/versions7.14.0-1Source reference:
/affected/0/versions7.14.1-1Source reference:
/affected/0/versions7.14.2-1Source reference:
/affected/0/versions7.15.0-1Source reference:
/affected/0/versions7.15.1-1Source reference:
/affected/0/versions7.15.2-1Source reference:
/affected/0/versions7.15.3-1Source reference:
/affected/0/versions7.15.5-1Source reference:
/affected/0/versions7.4.5-1Source reference:
/affected/0/versions7.9.2-0.1Source reference:
/affected/0/versions8.0.1-1Source reference:
/affected/0/versions8.0.2-1Source reference:
/affected/0/versions8.1.0-1Source reference:
/affected/0/versions8.2.0-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
guzzle
Source reference: /affected/1/package/name
- Affected versions
- 7.11.0-1
Source reference:
/affected/1/versions7.12.0-1Source reference:
/affected/1/versions7.12.1-1Source reference:
/affected/1/versions7.12.3-1Source reference:
/affected/1/versions7.13.1-1Source reference:
/affected/1/versions7.14.0-1Source reference:
/affected/1/versions7.14.1-1Source reference:
/affected/1/versions7.14.2-1Source reference:
/affected/1/versions7.15.0-1Source reference:
/affected/1/versions7.15.1-1Source reference:
/affected/1/versions7.15.2-1Source reference:
/affected/1/versions7.15.3-1Source reference:
/affected/1/versions7.15.5-1Source reference:
/affected/1/versions7.9.2-0.1Source reference:
/affected/1/versions8.0.1-1Source reference:
/affected/1/versions8.0.2-1Source reference:
/affected/1/versions8.1.0-1Source reference:
/affected/1/versions8.2.0-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
guzzle
Source reference: /affected/2/package/name
- Affected versions
- 7.11.0-1
Source reference:
/affected/2/versions7.12.0-1Source reference:
/affected/2/versions7.9.2-0.1Source reference:
/affected/2/versions - Fixed versions
- 7.12.1-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "guzzle",
"purl": "pkg:deb/debian/guzzle?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"7.11.0-1",
"7.12.0-1",
"7.12.1-1",
"7.12.3-1",
"7.13.1-1",
"7.14.0-1",
"7.14.1-1",
"7.14.2-1",
"7.15.0-1",
"7.15.1-1",
"7.15.2-1",
"7.15.3-1",
"7.15.5-1",
"7.4.5-1",
"7.9.2-0.1",
"8.0.1-1",
"8.0.2-1",
"8.1.0-1",
"8.2.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55767.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "guzzle",
"purl": "pkg:deb/debian/guzzle?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"7.11.0-1",
"7.12.0-1",
"7.12.1-1",
"7.12.3-1",
"7.13.1-1",
"7.14.0-1",
"7.14.1-1",
"7.14.2-1",
"7.15.0-1",
"7.15.1-1",
"7.15.2-1",
"7.15.3-1",
"7.15.5-1",
"7.9.2-0.1",
"8.0.1-1",
"8.0.2-1",
"8.1.0-1",
"8.2.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55767.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.12.1-1"
}
]
}
],
"package": {
"name": "guzzle",
"purl": "pkg:deb/debian/guzzle?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7.11.0-1",
"7.12.0-1",
"7.9.2-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55767.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57385 · Revision 1
- Added to Heist Feed
- Publisher date