Description

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.18, SseStream._transform() interpolates message.type and message.id directly into Server-Sent Events text protocol output without sanitizing newline characters (\r, \n). Since the SSE protocol treats both \r and \n as field delimiters and \n\n as event boundaries, an attacker who can influence these fields through upstream data sources can inject arbitrary SSE events, spoof event types, and corrupt reconnection state. This vulnerability is fixed in 11.1.18.

INFO

Published Date :

2026-04-07T15:06:10.619Z

Last Modified :

2026-04-07T15:58:37.067Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-35515 vulnerability.

Vendors Products
Nestjs
  • Nest
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-35515.

URL Resource
https://github.com/nestjs/nest/security/advisories/GHSA-36xv-jgw5-4q75 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-35515 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-35515 cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
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