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api-server-sent-events

Server-Sent Events (SSE / EventSource) exploitation — origin abuse for cross-site streaming exfil, prompt-injection via SSE messages into LLM clients, retry-after token leak, fragmenting events to bypass content-type sniffers.

packages/decepticon/decepticon/skills/standard/exploit/api/server-sent-events/SKILL.md

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Network or broad shell
Last checked
Nov 8, 2026

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Repository last updated
Nov 7, 2026
License
Apache-2.0

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# Server-Sent Events (SSE) Attack Surface

SSE is one-way (server → browser) over HTTP/1.1 or HTTP/2 with `Content-Type: text/event-stream`. Used by LLM chat UIs, live dashboards, progress notifications, log streamers.

## Detect

```bash
curl -sk -i https://target/stream -H "Accept: text/event-stream" | head
# Look for: Content-Type: text/event-stream
# Body format:
#   id: 42
#   event: message
#   data: {"foo":"bar"}
#   (blank line ends one event)