CVE-2024-49767VulnerabilityPublished 25 Oct 2024Updated 9 Nov 2026

Python werkzeug: Applications using werkzeug.formparser.MultiPartParser corresponding to a version of Werkzeug prior

Affects python-werkzeugSource GCVE Database

Authoritative record:CVE-2024-49767· Medium 6.9

Not known to be exploited · CVSS 6.9 Medium · fixed in 2.0.2+dfsg1-1ubuntu0.22.04.3 : update python-werkzeug when convenient.

Data as of 9 Nov 2026, 14:34 UTC

CVSS 4.0 base score

6.9Medium

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

Patch: Available – fixed in 2.0.2+dfsg1-1ubuntu0.22.04.3, 3.0.1-3ubuntu0.2

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system 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 Vulnerable System 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 Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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

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 9 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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-werkzeug to 2.0.2+dfsg1-1ubuntu0.22.04.3 (package) or 3.0.1-3ubuntu0.2 (package).

Patches and advisories

ubuntu.com/security/notices/USN-7093-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu 26.10quart`pkg:deb/ubuntu/quart?arch=source&distro=stonking`Other threats	Affected =0.20.0-5	Fixed in–
Ubuntu 25.10quart`pkg:deb/ubuntu/quart?arch=source&distro=questing`Other threats	Affected =0.20.0-1	Fixed in–
Ubuntu 24.04 LTSpython-werkzeug`pkg:deb/ubuntu/python-werkzeug?arch=source&distro=noble`Other threats	Affected <3.0.1-3ubuntu0.2	Fixed in 3.0.1-3ubuntu0.2
Ubuntu 24.04 LTSquart`pkg:deb/ubuntu/quart?arch=source&distro=noble`Other threats	Affected =0.18.3-2 =0.19.4-1	Fixed in–
Ubuntu 22.04 LTSpython-werkzeug`pkg:deb/ubuntu/python-werkzeug?arch=source&distro=jammy`Other threats	Affected <2.0.2+dfsg1-1ubuntu0.22.04.3	Fixed in 2.0.2+dfsg1-1ubuntu0.22.04.3
Ubuntu 22.04 LTSquart`pkg:deb/ubuntu/quart?arch=source&distro=jammy`Other threats	Affected =0.14.1-1	Fixed in–

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

AI-suggested

A fix is available and should be applied by updating Werkzeug to version 3.0.6 or later. Ubuntu users should update to the patched package versions 2.0.2+dfsg1-1ubuntu0.22.04.3 or 3.0.1-3ubuntu0.2 as per the Ubuntu security notice USN-7093-1. Standard system updates will apply the necessary changes. No additional mitigation is required once patched.

Description

Werkzeug versions prior to 3.0.6 contain a vulnerability in the MultiPartParser component used to parse multipart/form-data requests. This flaw allows an attacker to craft form submissions that cause excessive memory allocation, potentially exhausting system RAM and leading to denial of service. The issue is fixed in Werkzeug version 3.0.6 and later.

Impact

An attacker can remotely cause Werkzeug to consume excessive system memory by sending specially crafted multipart/form-data requests, leading to denial of service due to resource exhaustion. There is no confidentiality or integrity impact reported. The vulnerability has a CVSS 3.1 score of 7.5 (high severity) reflecting its potential to disrupt availability.

Summary

Werkzeug, a WSGI web application library, has a vulnerability in its MultiPartParser prior to version 3.0.6. When parsing multipart/form-data requests, the parser can allocate 3 to 8 times the size of the uploaded data in memory without an upper limit. This can be exploited by sending specially crafted form submissions that rapidly consume large amounts of RAM, causing resource exhaustion and denial of service. The vulnerability affects all applications using vulnerable Werkzeug versions, including Flask applications. The issue is resolved in Werkzeug 3.0.6. Ubuntu security advisories confirm fixes in package versions 2.0.2+dfsg1-1ubuntu0.22.04.3 and 3.0.1-3ubuntu0.2.

References

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