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CVE-2026-3520

A denial of service flaw was found in Multer, a Node.js middleware for handling `multipart/form-data`. A remote attacker can send specially crafted malformed requests which may induce a stack overflow. This can lead to a Denial of Service (DoS) making the service unavailable.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:62e1686e8f891f9271072c9ff3dc486cb517946014d1997c82d85ba445e1051c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:rhdh:1.8::el9"],"defaultStatus":"affected","packageName":"rhdh/rhdh-hub-rhel9","product":"Red Hat Developer Hub 1.8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1774545605","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:ansible_portal:2"],"defaultStatus":"affected","packageName":"ansible-automation-platform/automation-portal","product":"Self-service automation portal 2","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/affected/2

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:rhdh:1.9::el9"],"defaultStatus":"affected","packageName":"rhdh/rhdh-hub-rhel9","product":"Red Hat Developer Hub 1.9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1775140647","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/affected/1

{"defaultStatus":"unaffected","packageURL":"pkg:npm/multer","product":"multer","vendor":"expressjs","versions":[{"lessThan":"2.1.1","status":"affected","version":"0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/metrics/1/cvssV3_1

{"metric":{"baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-770","description":"Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

4 source assertions
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:rhdh:1.8::el9"],"defaultStatus":"affected","packageName":"rhdh/rhdh-hub-rhel9","product":"Red Hat Developer Hub 1.8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1774545605","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:ansible_portal:2"],"defaultStatus":"affected","packageName":"ansible-automation-platform/automation-portal","product":"Self-service automation portal 2","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/affected/2
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:rhdh:1.9::el9"],"defaultStatus":"affected","packageName":"rhdh/rhdh-hub-rhel9","product":"Red Hat Developer Hub 1.9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1775140647","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/affected/1
{"defaultStatus":"unaffected","packageURL":"pkg:npm/multer","product":"multer","vendor":"expressjs","versions":[{"lessThan":"2.1.1","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-770","description":"Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

9 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:6174"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/references/3
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:6802"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/references/4
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-3520"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/references/0
{"name":"RHBZ#2444584","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2444584"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/references/1
{"url":"https://cna.openjsf.org/security-advisories.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/references/3
{"url":"https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/references/2
{"url":"https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3520.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/adp/1/references/2
{"url":"https://www.cve.org/CVERecord?id=CVE-2026-3520"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bce00e9ab165900eae9255c4e5926574bdc10a10c15154005a221a6eff3bcc74 · sha256:5675c0efe465cbae… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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