DEBIAN-CVE-2025-66418

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2025-66418
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66418.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2025-66418
Upstream
Published
2025-12-05T16:15:51.053Z
Modified
2025-12-11T11:15:29.295663Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.

References

Affected packages

Debian:11 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

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

Affected versions

1.*

1.26.5-1~exp1
1.26.5-1~exp1+deb11u1
1.26.8-1
1.26.9-1
1.26.12-1
1.26.16-1
1.26.17-1
1.26.18-1
1.26.18-2

2.*

2.0.7-1
2.0.7-2
2.2.3-1
2.2.3-2
2.2.3-3
2.2.3-4
2.3.0-1
2.3.0-2
2.3.0-3
2.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

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

Affected versions

1.*

1.26.12-1
1.26.12-1+deb12u1
1.26.16-1
1.26.17-1
1.26.18-1
1.26.18-2

2.*

2.0.7-1
2.0.7-2
2.2.3-1
2.2.3-2
2.2.3-3
2.2.3-4
2.3.0-1
2.3.0-2
2.3.0-3
2.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

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

Affected versions

2.*

2.3.0-3
2.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/debian/python-urllib3?arch=source

Affected ranges

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

Affected versions

2.*

2.3.0-3
2.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}