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Full vulnerability report · 2024
CVE-2024-24762High confidence

python-multipart vulnerable to content-type header Regular expression Denial of Service

Kludex · python-multipart

Official source article: GitHub GHSA-2JV5-9R88-3W3P ↗. Check the applicable product and release in the original source.

7.5HighCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 9 May 2025

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 1.51% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Kludex python-multipart and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

4 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 1 affected package state shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcepython-multipartVendor fix publishedDebian records a fixed source-package version for this release.0.0.9-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcepython-multipartAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcepython-multipartVendor fix publishedDebian records a fixed source-package version for this release.0.0.9-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcepython-multipartVendor fix publishedDebian records a fixed source-package version for this release.0.0.9-1Debian Security Tracker ↗Source updated 5 Oct 2026
Open-source package ranges1 source-attributed range

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
pippython-multipart<= 0.0.60.0.7GitHub advisory ↗upstream repository advisory · 3 Apr 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2024-0059

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.

What

`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Uncontrolled Resource Consumption → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-400 ↗

CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-400Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-0592IBM App Connect Enterprise: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in IBM App Connect Enterprise ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20240207Security Bulletin 07 Feb 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 07 Feb 2024, published on 7 February 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1094Multiples vulnérabilités dans les produits IBM

0 Bulletin de sécurité IBM 7285472 du 27 août 2026 https://www.ibm.com/support/pages/node/7285472 Bulletin de sécurité IBM 7285509 du 28 août 2026 https://www.ibm.com/support/pages/node/7285509 Bulletin de sécurité IBM 7285513 du 28 août 2026 https://www.ibm.com/support/pages/node/7285513 Bulletin de sécurité IBM 7285539 du 28 août 2026 https://www.ibm.com/support/pages/node/7285539 Bulletin de sécurité IBM 7285542 du 28 août 2026 https://www.ibm.com/support/pages/node/7285542 Référence CVE CVE-2018-16487 https://www.cve.org/CVERecord?id=CVE-2018-16487 Référence CVE CVE-2021-23336 https://www.cve.org/CVERecord?id=CVE-2021-23336 Référence CVE CVE-2024-24762 https://www.cve.org/CVERecord?id=CVE-2024-24762 Référence CVE CVE-2025-10263 https://www.cve.org/CVERecord?id=CVE-2025-10263 Référence CVE CVE-2025-13151 https://www.cve.org/CVERecord?id=CVE-2025-13151 Référence CVE CVE-2025-14505 https://www.cve.org/CVERecord?id=CVE-2025-14505 Référence CVE CVE-2025-14914 https://www.cve.org/CVERecord?id=CVE-2025-14914 Référence CVE CVE-2025-14920 https://www.cve.org/CVERecord?id=CVE-2025-14920 Référence CVE CVE-2025-15599 https://www.cve.org/CVERecord?id=CVE-2025-15599 Référence CVE CVE-2025-40026 https://www.cve.org/CVERecord?id=CVE-2025-40026 Référence CVE CVE-2025-47273 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

ecord?id=CVE-2024-21210 Référence CVE CVE-2024-21217 https://www.cve.org/CVERecord?id=CVE-2024-21217 Référence CVE CVE-2024-21235 https://www.cve.org/CVERecord?id=CVE-2024-21235 Référence CVE CVE-2024-21510 https://www.cve.org/CVERecord?id=CVE-2024-21510 Référence CVE CVE-2024-21742 https://www.cve.org/CVERecord?id=CVE-2024-21742 Référence CVE CVE-2024-2236 https://www.cve.org/CVERecord?id=CVE-2024-2236 Référence CVE CVE-2024-22365 https://www.cve.org/CVERecord?id=CVE-2024-22365 Référence CVE CVE-2024-23337 https://www.cve.org/CVERecord?id=CVE-2024-23337 Référence CVE CVE-2024-2398 https://www.cve.org/CVERecord?id=CVE-2024-2398 Référence CVE CVE-2024-24762 https://www.cve.org/CVERecord?id=CVE-2024-24762 Référence CVE CVE-2024-24783 https://www.cve.org/CVERecord?id=CVE-2024-24783 Référence CVE CVE-2024-24784 https://www.cve.org/CVERecord?id=CVE-2024-24784 Référence CVE CVE-2024-24785 https://www.cve.org/CVERecord?id=CVE-2024-24785 Référence CVE CVE-2024-24786 https://www.cve.org/CVERecord?id=CVE-2024-24786 Référence CVE CVE-2024-24787 https://www.cve.org/CVERecord?id=CVE-2024-24787 Référence CVE CVE-2024-24788 https://www.cve.org/CVERecord?id=CVE-2024-24788 Référence CVE CVE-2024-24789 https://www.cve.org/CVERecord?id=CVE-2024-24789 Référence CVE CVE-2024-24790 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0199Multiples vulnérabilités dans IBM

ord?id=CVE-2023-45857 Référence CVE CVE-2023-47248 https://www.cve.org/CVERecord?id=CVE-2023-47248 Référence CVE CVE-2023-5676 https://www.cve.org/CVERecord?id=CVE-2023-5676 Référence CVE CVE-2024-20918 https://www.cve.org/CVERecord?id=CVE-2024-20918 Référence CVE CVE-2024-20921 https://www.cve.org/CVERecord?id=CVE-2024-20921 Référence CVE CVE-2024-20945 https://www.cve.org/CVERecord?id=CVE-2024-20945 Référence CVE CVE-2024-20952 https://www.cve.org/CVERecord?id=CVE-2024-20952 Référence CVE CVE-2024-23334 https://www.cve.org/CVERecord?id=CVE-2024-23334 Référence CVE CVE-2024-23829 https://www.cve.org/CVERecord?id=CVE-2024-23829 Référence CVE CVE-2024-24762 https://www.cve.org/CVERecord?id=CVE-2024-24762 Gestion détaillée du document le 08 mars 2024 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-002536The FastAPI Expert の python-multipart における非効率的な正規表現の複雑さに関する脆弱性

The FastAPI Expert の python-multipart には、非効率的な正規表現の複雑さに関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 5 Feb 2024 · Last source change 9 May 2025, 16:32 UTC · CWE-400 · Uncontrolled Resource Consumption

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2024-0059
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2024-24762 · cve.blacktree.nl