DEBIAN-CVE-2026-97689

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Source
https://security-tracker.debian.org/tracker/CVE-2026-97689
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-97689.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-97689
Upstream
Published
2026-09-29T16:17:18Z
Modified
2026-09-30T05:01:19Z
Severity
  • 8.9 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0.

References

Affected packages

Debian:12 / python-urllib3

Package

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

Affected ranges

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

Affected versions

1.*
1.26.12-1
1.26.12-1+deb12u1
1.26.12-1+deb12u2
1.26.12-1+deb12u3
1.26.12-1+deb12u4
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
2.5.0-1.1
2.5.0-2
2.6.3-1
2.6.3-2
2.7.0-1
2.7.0-2
2.7.0-3
2.8.0-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-97689.json"

Debian:13 / python-urllib3

Package

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

Affected ranges

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

Affected versions

2.*
2.3.0-3
2.3.0-3+deb13u1
2.3.0-3+deb13u2
2.5.0-1
2.5.0-1.1
2.5.0-2
2.6.3-1
2.6.3-2
2.7.0-1
2.7.0-2
2.7.0-3
2.8.0-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-97689.json"

Debian:14 / python-urllib3

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.8.0-1

Affected versions

2.*
2.3.0-3
2.5.0-1
2.5.0-1.1
2.5.0-2
2.6.3-1
2.6.3-2
2.7.0-1
2.7.0-2
2.7.0-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-97689.json"