How severe is CVE-2026-8162?

CVE-2026-8162 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-8162 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8162?

CVE-2026-8162 affects Pillarjs Multiparty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8162?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-8162 have an EU (EUVD) identifier?

Yes. CVE-2026-8162 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29441.

When was CVE-2026-8162 published?

CVE-2026-8162 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-8162

Q: What is CVE-2026-8162?

multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a Content-Disposition header whose filename* parameter contains a malformed percent-encoding, the parser invokes decodeURI on the value without try/catch. The resulting URIError propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.

CVE-2026-8162 is a high-severity vulnerability in Pillarjs Multiparty with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-755.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29441
Weakness: CWE-755
Affected product: Pillarjs Multiparty
Published: 2026-05-12
Last modified: 2026-06-17

Description

[email protected] and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a Content-Disposition header whose filename* parameter contains a malformed percent-encoding, the parser invokes decodeURI on the value without try/catch. The resulting URIError propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to [email protected] or higher.

Frequently asked questions

What is CVE-2026-8162?: [email protected] and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a Content-Disposition header whose filename* parameter contains a malformed percent-encoding, the parser invokes decodeURI on the value without try/catch. The resulting URIError propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to [email protected] or higher.
How severe is CVE-2026-8162?: CVE-2026-8162 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-8162 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8162?: CVE-2026-8162 affects Pillarjs Multiparty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8162?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-8162 have an EU (EUVD) identifier?: Yes. CVE-2026-8162 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29441.
When was CVE-2026-8162 published?: CVE-2026-8162 was published on 2026-05-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pillarjs:multiparty:*:*:*:*:*:node.js:*:*

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