DEBIAN-CVE-2026-42561

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Source
https://security-tracker.debian.org/tracker/CVE-2026-42561
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42561.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-42561
Upstream
Published
2026-05-13T21:16:47Z
Modified
2026-09-14T17:03:36Z
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

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.27, python-multipart has a denial of service vulnerability in multipart part header parsing. When parsing multipart/form-data, MultipartParser previously had no limit on the number of part headers or the size of an individual part header. An attacker could send a request with either many repeated headers without terminating the header block or a single very large header value, causing excessive CPU work before request rejection or completion. This vulnerability is fixed in 0.0.27.

References

Affected packages

Debian:12 / python-multipart

Package

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

Affected ranges

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

Affected versions

0.*
0.0.5-3
0.0.6-1
0.0.9-1
0.0.17-1
0.0.17-2
0.0.17-3
0.0.17-4
0.0.17-5
0.0.20-1
0.0.20-1.1~deb13u1
0.0.20-1.1
0.0.22-1
0.0.26-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42561.json"

Debian:13 / python-multipart

Package

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

Affected ranges

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

Affected versions

0.*
0.0.20-1
0.0.20-1.1~deb13u1
0.0.20-1.1
0.0.22-1
0.0.26-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42561.json"

Debian:14 / python-multipart

Package

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

Affected ranges

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

Affected versions

0.*
0.0.20-1
0.0.20-1.1~deb13u1
0.0.20-1.1
0.0.22-1
0.0.26-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42561.json"