DEBIAN-CVE-2026-28356

Source
https://security-tracker.debian.org/tracker/CVE-2026-28356
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28356.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-28356
Upstream
Downstream
Published
2026-03-12T17:16:50Z
Modified
2026-09-14T17:03:25Z
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

multipart is a fast multipart/form-data parser for python. Prior to 1.2.2, 1.3.1 and 1.4.0-dev, the parse_options_header() function in multipart.py uses a regular expression with an ambiguous alternation, which can cause exponential backtracking (ReDoS) when parsing maliciously crafted HTTP or multipart segment headers. This can be abused for denial of service (DoS) attacks against web applications using this library to parse request headers or multipart/form-data streams. The issue is fixed in 1.2.2, 1.3.1 and 1.4.0-dev.

References

Affected packages

Debian:13 / multipart

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.1-2+deb13u1

Affected versions

1.*
1.2.1-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28356.json"

Debian:14 / multipart

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.3.1-1

Affected versions

1.*
1.2.1-2
1.3.0-1
1.3.0-2
1.3.0-3

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28356.json"