chore(deps): update dependency @nestjs/core to v11.1.18 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@nestjs/core (source)	11.1.17 → 11.1.18

GitHub Vulnerability Alerts

CVE-2026-35515

Impact

What kind of vulnerability is it? Who is impacted?

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. Spring Framework's own security patch (6e97587) validates these same fields (id, event) for the same reason.

Actual impact:

• Event spoofing: Attacker forges SSE events with arbitrary event: types, causing client-side EventSource.addEventListener() callbacks to fire for wrong event types.
• Data injection: Attacker injects arbitrary data: payloads, potentially triggering XSS if the client renders SSE data as HTML without sanitization.
• Reconnection corruption: Attacker injects id: fields, corrupting the Last-Event-ID header on reconnection, causing the client to miss or replay events.
• Attack precondition: Requires the developer to map user-influenced data to the type or id fields of SSE messages. Direct HTTP request input does not reach these fields without developer code bridging the gap.

Patches

Has the problem been patched? What versions should users upgrade to?

Patched in @nestjs/core@11.1.18

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Release Notes

nestjs/nest (@​nestjs/core)

v11.1.18

Compare Source

v11.1.18 (2026-04-03)

Bug fixes

• microservices
  • #​16675 fix(microservices): preserve packet headers in nats serializer (@​wwenrr)
• core
  • #​16683 fix(core): prevent injector hang when design:paramtypes is missing (@​Youmoo)
  • #​16637 fix(core): dependency injection edge case with moduleref.create (@​JakobStaudinger)
  • #​16686 fix(core): sanitize sse message

Dependencies

• core, platform-express, platform-fastify
  • #​16679 fix(deps): update dependency path-to-regexp to v8.4.2 (@​renovate[bot])
• platform-fastify
  • #​16623 fix(deps): update dependency fastify to v5.8.4 (@​renovate[bot])
• platform-ws
  • #​16618 chore(deps): bump ws from 8.19.0 to 8.20.0 (@​dependabot[bot])
• common
  • #​16619 chore(deps): bump file-type from 21.3.3 to 21.3.4 (@​dependabot[bot])

Committers: 6

• Ankit San (@​ankitbelal)
• Jakob Staudinger (@​JakobStaudinger)
• Kamil Mysliwiec (@​kamilmysliwiec)
• Krishna Chaitanya (@​Krishnachaitanyakc)
• MK (@​wwenrr)
• youmoo (@​Youmoo)

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