[USN-8027-1] Python-Multipart vulnerabilities

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Ubuntu Security Notice USN-8027-1
February 11, 2026

python-multipart vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in Python-Multipart.

Software Description:
- python-multipart: A streaming multipart parser for Python.

Details:

It was discovered that Python-Multipart incorrectly handled certain
regular expressions. An attacker could possibly use this issue to cause
Python-Multipart to consume excessive resources, leading to a regular
expression denial of service. This issue only affected Ubuntu 22.04 LTS.
(CVE-2024-24762)

It was discovered that Python-Multipart did not properly sanitize line
breaks during user input. An attacker could use this issue to send
arbitrary input, thus preventing other requests from being processed,
resulting in a denial of service. This issue was only fixed in
Ubuntu 24.04 LTS. (CVE-2024-53981)

It was discovered that Python-Multipart was vulnerable to path traversal
attacks. An attacker could possibly craft and upload files outside the
target directory, resulting in remote code execution. (CVE-2026-24486)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
python3-multipart 0.0.9-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 22.04 LTS
python3-multipart 0.0.5-2ubuntu0.1~esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8027-1
CVE-2024-24762, CVE-2024-53981, CVE-2026-24486