CVE Explorer
CVE-2026-8159
multiparty@4.2.3 and lower versions are vulnerable to denial of service via regular expression backtracking in the Content-Disposition filename parameter parser. A crafted multipart upload with a long header value can cause regex matching to take seconds, blocking the event loop. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: limiting upload sizes at the proxy or gateway layer reduces but does not eliminate the attack surface, since a small header of aro
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","packageURL":"pkg:npm/multiparty","product":"multiparty","vendor":"multiparty","versions":[{"lessThanOrEqual":"4.2.3","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"4.3.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:f5e4480d7c5c849d274785dd0e9c957a9300fad3bc558ddf780a8397764ceeea · sha256:9a56b27e8381248b… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"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_v5cvssurn:baitaphish:normalized-source-record:v2:f5e4480d7c5c849d274785dd0e9c957a9300fad3bc558ddf780a8397764ceeea · sha256:9a56b27e8381248b… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:f5e4480d7c5c849d274785dd0e9c957a9300fad3bc558ddf780a8397764ceeea · sha256:9a56b27e8381248b… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"url":"https://cna.openjsf.org/security-advisories.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f5e4480d7c5c849d274785dd0e9c957a9300fad3bc558ddf780a8397764ceeea · sha256:9a56b27e8381248b… · /containers/cna/references/2
{"url":"https://github.com/pillarjs/multiparty/security/advisories/GHSA-65x3-rw7q-gx94"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f5e4480d7c5c849d274785dd0e9c957a9300fad3bc558ddf780a8397764ceeea · sha256:9a56b27e8381248b… · /containers/cna/references/0
{"url":"https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f5e4480d7c5c849d274785dd0e9c957a9300fad3bc558ddf780a8397764ceeea · sha256:9a56b27e8381248b… · /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.