CVE-2018-16492 — A prototype pollution vulnerability was found in module extend <2

A prototype pollution vulnerability was found in module extend <2.0.2, ~<3.0.2 that allows an attacker to inject arbitrary properties onto Object.prototype.

01What is this vulnerability?

A prototype pollution vulnerability was found in module extend <2.0.2, ~<3.0.2 that allows an attacker to inject arbitrary properties onto Object.prototype.

02Affected products

Vendor	Product	Versions
HackerOne	extend	< 2.0.2, ~<3.0.2

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-02-01T18:00:00.000Z
• Last modified: 2024-08-05T10:24:32.840Z

09References

• hackerone.com — https://hackerone.com/reports/381185