Multer vulnerable to Denial of Service via unhandled exception from malformed request
expressjs · multer
7.5HighCVSS 3.1
Recommended action
Within 7 days
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available
Direct vendor intelligence
Authoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
1 current
CVE-2025-7338 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitymulter: Multer Denial of Service
1 known affected
The vendor explicitly identifies these products as affected by this CVE.
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless
Summary
A denial of service vulnerability was found in the Multer NPM library. This vulnerability allows an attacker to trigger a denial of service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, resulting in a process crash.
Remediation
For more about Red Hat Developer Hub, see References links
Optional official sources
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.
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-2025-21776
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 actionWithin 7 days
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available
01
What, why and how
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.2 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to version 2.0.2 to receive a patch. No known workarounds are available.
What
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.2 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to version 2.0.2 to receive a patch. No known workarounds are available.
Why
An exception is thrown from a function, but it is not caught.
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
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.2 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to version 2.0.2 to receive a patch. No known workarounds are available.
Why
An exception is thrown from a function, but it is not caught.
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.None recorded
No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
Likely attack path
a network path → Uncaught Exception → 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-248: Uncaught Exception. An exception is thrown from a function, but it is not caught.
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-248
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2025-21776Official EUVD mapping
0 linked advisory records.
Official EUVD recordBSI · German · WID-SEC-W-2025-2424IBM Rational Team Concert: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in IBM Rational Team Concert ausnutzen, um einen Denial-of-Service-Angriff durchzuführen, Eingaben oder Protokolle zu manipulieren, die Authentifizierung zu umgehen, beliebigen Code auszuführen, Cross-Site-Scripting durchzuführen, sensible Informationen offenzulegen oder offene Weiterleitungen auszulösen.
Official advisoryBSI · German · WID-SEC-W-2025-1929IBM App Connect Enterprise: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um einen Denial of Service Angriff durchzuführen, um Daten zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.
Official advisoryBSI · German · WID-SEC-W-2025-1854HCL BigFix Komponente: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in HCL BigFix Komponente ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen, um Daten zu manipulieren, um Informationen offenzulegen, und um einen Cross-Site Scripting Angriff durchzuführen.
Official advisoryCERT-FR · French · CERTFR-2026-AVI-0958Multiples vulnérabilités dans les produits IBM
Official advisoryCERT-FR · French · CERTFR-2025-AVI-1072Multiples vulnérabilités dans les produits IBM
ord?id=CVE-2025-48795
Référence CVE CVE-2025-48913
https://www.cve.org/CVERecord?id=CVE-2025-48913
Référence CVE CVE-2025-48997
https://www.cve.org/CVERecord?id=CVE-2025-48997
Référence CVE CVE-2025-50106
https://www.cve.org/CVERecord?id=CVE-2025-50106
Référence CVE CVE-2025-56200
https://www.cve.org/CVERecord?id=CVE-2025-56200
Référence CVE CVE-2025-57350
https://www.cve.org/CVERecord?id=CVE-2025-57350
Référence CVE CVE-2025-58754
https://www.cve.org/CVERecord?id=CVE-2025-58754
Référence CVE CVE-2025-5889
https://www.cve.org/CVERecord?id=CVE-2025-5889
Référence CVE CVE-2025-59343
https://www.cve.org/CVERecord?id=CVE-2025-59343
Référence CVE CVE-2025-7338
https://www.cve.org/CVERecord?id=CVE-2025-7338
Référence CVE CVE-2025-7339
https://www.cve.org/CVERecord?id=CVE-2025-7339
Référence CVE CVE-2025-7783
https://www.cve.org/CVERecord?id=CVE-2025-7783
Gestion détaillée du document
le 05 décembre 2025
Version initiale
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À propos
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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 advisoryCERT-FR · French · CERTFR-2025-AVI-0896Multiples vulnérabilités dans les produits IBM
ord?id=CVE-2025-50059
Référence CVE CVE-2025-50106
https://www.cve.org/CVERecord?id=CVE-2025-50106
Référence CVE CVE-2025-50181
https://www.cve.org/CVERecord?id=CVE-2025-50181
Référence CVE CVE-2025-50182
https://www.cve.org/CVERecord?id=CVE-2025-50182
Référence CVE CVE-2025-53864
https://www.cve.org/CVERecord?id=CVE-2025-53864
Référence CVE CVE-2025-55668
https://www.cve.org/CVERecord?id=CVE-2025-55668
Référence CVE CVE-2025-58754
https://www.cve.org/CVERecord?id=CVE-2025-58754
Référence CVE CVE-2025-5889
https://www.cve.org/CVERecord?id=CVE-2025-5889
Référence CVE CVE-2025-59343
https://www.cve.org/CVERecord?id=CVE-2025-59343
Référence CVE CVE-2025-7338
https://www.cve.org/CVERecord?id=CVE-2025-7338
Référence CVE CVE-2025-7783
https://www.cve.org/CVERecord?id=CVE-2025-7783
Gestion détaillée du document
le 17 octobre 2025
Version initiale
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À propos
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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 advisoryCERT-FR · French · CERTFR-2025-AVI-0746Multiples vulnérabilités dans les produits IBM
ecord?id=CVE-2025-49796
Référence CVE CVE-2025-50059
https://www.cve.org/CVERecord?id=CVE-2025-50059
Référence CVE CVE-2025-50106
https://www.cve.org/CVERecord?id=CVE-2025-50106
Référence CVE CVE-2025-52434
https://www.cve.org/CVERecord?id=CVE-2025-52434
Référence CVE CVE-2025-52520
https://www.cve.org/CVERecord?id=CVE-2025-52520
Référence CVE CVE-2025-53506
https://www.cve.org/CVERecord?id=CVE-2025-53506
Référence CVE CVE-2025-55668
https://www.cve.org/CVERecord?id=CVE-2025-55668
Référence CVE CVE-2025-6021
https://www.cve.org/CVERecord?id=CVE-2025-6021
Référence CVE CVE-2025-6965
https://www.cve.org/CVERecord?id=CVE-2025-6965
Référence CVE CVE-2025-7338
https://www.cve.org/CVERecord?id=CVE-2025-7338
Référence CVE CVE-2025-7425
https://www.cve.org/CVERecord?id=CVE-2025-7425
Référence CVE CVE-2025-7783
https://www.cve.org/CVERecord?id=CVE-2025-7783
Gestion détaillée du document
le 29 août 2025
Version initiale
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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
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.
Patch available
Affected
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless
Fixed
registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
Action
For more about Red Hat Developer Hub, see References links
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 17 Jul 2025 · Last source change 17 Jul 2025, 16:48 UTC · CWE-248 · Uncaught Exception
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-2025-21776
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Affected versionsThe structured affected or fixed version information changed.
Before
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless · Fixed: registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub (RHDH) 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
After
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless · Fixed: registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
Affected versionsThe structured affected or fixed version information changed.
Before
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless · Fixed: registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
After
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless · Fixed: registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub (RHDH) 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
Affected versionsThe structured affected or fixed version information changed.
Before
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless · Fixed: registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub (RHDH) 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
After
openshift-serverless-1/kn-backstage-plugins-eventmesh-rhel8 as a component of OpenShift Serverless · Fixed: registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:48b72d96926999336505cbf097f873dd9ccb2dec814a5db7f7ffa630dea29dc5_amd64 as a component of Red Hat Developer Hub 1.6; registry.redhat.io/rhdh/rhdh-hub-rhel9@sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c_amd64 as a component of Red Hat Developer Hub 1.7
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.
CVE-2025-7338: Multer vulnerable to Denial of Service via unhandled exception from malformed request | BlackTree