socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory…
Priority LOW 38CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
Summary
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
Why it matters now
EPSS 0.02671 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial socket.io-parser (npm): 3.3.2, 3.4.1Red Hat: 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | socket.io-parser (npm) | before 3.3.2 | 3.3.2 | Patch available | GHSA-xfhh-g9f5-x4m4 |
| — | socket.io-parser (npm) | 3.4.0 to before 3.4.1 | 3.4.1 | Patch available | GHSA-xfhh-g9f5-x4m4 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- socket.io-parser (npm) Vendor— Affected before 3.3.2 Fixed in 3.3.2 Patch available GHSA-xfhh-g9f5-x4m4
- socket.io-parser (npm) Vendor— Affected 3.4.0 to before 3.4.1 Fixed in 3.4.1 Patch available GHSA-xfhh-g9f5-x4m4
Remediation
- Fix · GHSA-xfhh-g9f5-x4m4 socket.io-parser (npm) Fixed in 3.3.2 Advisory →
- Fix · GHSA-xfhh-g9f5-x4m4 socket.io-parser (npm) Fixed in 3.4.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat 3scale API Management Platform 2 | Affected | No fix yet |
| Red Hat Quay 3 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Quay 3
Timeline
- 2026-10-02 Threatist record created from CVE-2020-36049
- 2026-10-03 Alias added: GHSA-xfhh-g9f5-x4m4
References
More socketio Socket.io-parser vulnerabilities
- TI-2022-02236 Socket.io - Improper type validation in attachment parsing CVSS 3.1CRITICAL 10.0
- TI-2026-25581 socket.io allows an unbounded number of binary attachments CVSS 4.0HIGH 8.7
- TI-2023-15971 Insufficient validation when decoding a Socket.IO packet CVSS 3.1HIGH 7.5
Sources
- CVE-2020-36049 · CVE Program
- CVE-2020-36049 · NVD
- FIRST EPSS
- GHSA-xfhh-g9f5-x4m4 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-36049 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences