VulnerabilityPublished 27 Jan 2026Updated 27 Oct 2026

CVE-2026-24486: Python-Multipart is a streaming multipart parser for Python

Affects python-multipartSource GCVE Database

Authoritative record:CVE-2026-24486· High 8.6

Public exploit available (Exploit-DB) · CVSS 8.6 High · fixed in 0.0.5-2ubuntu0.1~esm1 : patch python-multipart as a priority.

Data as of 27 Oct 2026, 06:42 UTC

CVSS 3.1 base score

8.6High

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 0.0.5-2ubuntu0.1~esm1, 0.0.9-1ubuntu0.1~esm1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: High
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 27 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
1 Exploit-DB entry, 93 days after disclosure
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by GitHub, Inc.
23 Jan 202600:38 UTC, 4 days before disclosure
CVE published
on cve.org
27 Jan 202600:34 UTC, t = 0
In Threat Radar
record ingested
27 Jan 202600:50 UTC, 17 minutes after disclosure
First Exploit-DB entry (opens in a new tab)
Python-Multipart 0.0.22 - Path Traversal
30 Apr 2026, 93 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade the Ubuntu python-multipart to 0.0.5-2ubuntu0.1~esm1 (package) or 0.0.9-1ubuntu0.1~esm1 (package).

Patches and advisories

ubuntu.com/security/notices/USN-8027-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu 26.10python-multipart`pkg:deb/ubuntu/python-multipart?arch=source&distro=stonking`Other threats	Affected =0.0.20-1.1 =0.0.26-1 =0.0.32-1	Fixed in–
Ubuntu 26.04 LTSpython-multipart`pkg:deb/ubuntu/python-multipart?arch=source&distro=resolute`Other threats	Affected =0.0.20-1 =0.0.20-1.1	Fixed in–
Ubuntu 25.10python-multipart`pkg:deb/ubuntu/python-multipart?arch=source&distro=questing`Other threats	Affected =0.0.20-1	Fixed in–
Ubuntu Pro 24.04 LTSpython-multipart`pkg:deb/ubuntu/python-multipart?arch=source&distro=esm-apps/noble`Other threats	Affected <0.0.9-1ubuntu0.1~esm1	Fixed in 0.0.9-1ubuntu0.1~esm1
Ubuntu Pro 22.04 LTSpython-multipart`pkg:deb/ubuntu/python-multipart?arch=source&distro=esm-apps/jammy`Other threats	Affected <0.0.5-2ubuntu0.1~esm1	Fixed in 0.0.5-2ubuntu0.1~esm1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.

References

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Exploitation evidence

Timeline

What to do

Patches and advisories

Affected software

Description

Public exploits and detection1 Exploit-DB entry

Technical details

References

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