CVE-2022-21676Uncaught Exception in engine.io
- 7.5HighCVSS base score
- 2.9%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the `engine.io` package starting from version `4.0.0`, including those who uses depending packages like `socket.io`. Versions prior to `4.0.0` are not impacted. A fix has been released for each major branch, namely `4.1.2` for the `4.x.x` branch, `5.2.1` for the `5.x.x` branch, and `6.1.1` for the `6.x.x` branch. There is no known workaround except upgrading to a safe version.
Timeline
ID reserved
By GitHub_M
- 57 days later
· 57 days later
Published
- 3 years later
· 3 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 |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.9% · top 13% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmengine.ioGHSA-273r-mgr4-v34f (opens in a new tab)
References
References8
- https://github.com/socketio/engine.io/security/advisories/GHSA-273r-mgr4-v34f (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/socketio/engine.io/commit/66f889fc1d966bf5bfa0de1939069153643874ab (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659db (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/socketio/engine.io/commit/c0e194d44933bd83bf9a4b126fca68ba7bf5098c (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/socketio/engine.io/releases/tag/4.1.2 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/socketio/engine.io/releases/tag/5.2.1 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/socketio/engine.io/releases/tag/6.1.1 (opens in a new tab)x_refsource_MISCx_transferred
- https://security.netapp.com/advisory/ntap-20220209-0002/ (opens in a new tab)x_refsource_CONFIRMx_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-2022-0421 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-273r-mgr4-v34f (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-2022-21676)Record last updated .