VulnSocial

CVE-2026-35515Disclosure(nestjs / nest)

LOWCVSS 6.1 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

nestjs CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-74

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • nest

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
nestjs
Products
nest

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-04-07: 2Technical Details · 2026-04-07: 204-07
Signal classification1 categories
Disclosure
2100.0%
Referenced assets4 URLs
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-35515 Server-Sent Events Injection in Nest Framework Prior to 11.1.18 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-35515 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4

    Post summary

    CVE-2026-35515 is a Server‑Sent Events injection vulnerability affecting Nest Framework versions earlier than 11.1.18, with only basic technical details provided and no evidence of PoC, exploit, or patch information.

    0000041
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    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 http://message.id directly… https://www.cve.org/CVERecord?id=CVE-2026-35515

    Post summary

    The post briefly notes a data interpolation flaw in Nest’s SseStream component before v11.1.18, providing some technical detail but no PoC, exploit, patch, or evidence of active exploitation.

    00000152
    57.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appnestjsnest-node.js-

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