CVE Feed

    Dashboard / CVE / CVE-2026-35515

    CVE-2026-35515

    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.

    Published:Apr 7, 2026
    Last Modified:Apr 17, 2026
    EPS:Apr 7, 2026
    EPSS Score:0.0002
    CVSS Score:6.1

    Affected Products

    Vendor
    Nestjs
    Product
    Nest

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-105 HTTP Request Splitting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-15 Command Delimiters
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-273 HTTP Response Smuggling
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-34 HTTP Response Splitting
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-51 Poison Web Service Registry
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-84 XQuery Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-54281 (CVSS 8.7) — Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.24, an authenticatio…
    CVE-2026-40879 (CVSS 7.5) — Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker…
    CVE-2026-33011 (CVSS 8.7) — Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a N…
    CVE-2026-2293 (CVSS 8.2) — A NestJS application using @nestjs/platform-fastify can allow bypass of authentication/authorization middlewar…
    CVE-2025-69211 (CVSS 6.9) — Nest is a framework for building scalable Node.js server-side applications. Versions prior to 11.1.11 have a F…
    CVE-2024-29409 (CVSS 5.5) — File Upload vulnerability in nestjs nest v.10.3.2 allows a remote attacker to execute arbitrary code via the C…
    CVE-2023-26108 (CVSS 3.7) — Versions of the package @nestjs/core before 9.0.5 are vulnerable to Information Exposure via the StreamableFil…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High