CVE-2016-10536
engine.io-client is the client for engine.io, the implementation of a transport-based cross-browser/cross-device bi-directional…
- 5.9MediumCVSS base score
- 0.98%Exploitation in 30 daysEPSS · top 38% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
engine.io-client is the client for engine.io, the implementation of a transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. The vulnerability is related to the way that node.js handles the `rejectUnauthorized` setting. If the value is something that evaluates to false, certificate verification will be disabled. This is problematic as engine.io-client 1.6.8 and earlier passes in an object for settings that includes the rejectUnauthorized property, whether it has been set or not. If the value has not been explicitly changed, it will be passed in as `null`, resulting in certificate verification being turned off.
Timeline
ID reserved
By hackerone
- 7 months later
· 7 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.98% · top 38% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
HackerOne · engine.io-client node module
- affected <= 1.6.8
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmengine.io-clientGHSA-4r4m-hjwj-43p8 (opens in a new tab)
References
3
- https://www.cigital.com/blog/node-js-socket-io/ (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/socketio/engine.io-client/commit/2c55b278a491bf45313ecc0825cf800e2f7ff5c1 (opens in a new tab)x_refsource_MISCx_transferred
- https://nodesecurity.io/advisories/99 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-0221 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-4r4m-hjwj-43p8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-10536)Record last updated .