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BUG: HTTPTarget turns CRLF into LF in the request body

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@nniiovoo 已经在做这个了。

开始于 2026年10月19日。

  • #3354 来自 @nniiovoo —— 未关闭

评估

难度
2/5
预计耗时
1-3 小时
新手友好度
25/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
停滞
技术栈
python
领域
api, backend

调研方向

The issue identifies HTTPTarget.parse_raw_http_request and describes a reproducible multipart request that fails in Starlette. Read that method and reproduce the example to confirm the body loses its CRLF line endings. Done means the request preserves the multipart separators and the example returns server got prompt='hello'.

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描述

Describe the bug

HTTPTarget.parse_raw_http_request replaces every \r\n in the raw request with \n before it splits the headers from the body, so the body loses its CRLFs too. This changes multipart boundary separators. The local example below fails with Starlette's multipart parser, which returns Invalid multipart data. A prompt that contains \r\n is changed the same way.

The comment just above that line says body whitespace should be kept exactly as given.

Steps/Code to Reproduce
import asyncio

import httpx
from starlette.applications import Starlette
from starlette.responses import PlainTextResponse
from starlette.routing import Route

from pyrit.models import Message
from pyrit.prompt_target import HTTPTarget
from pyrit.setup import IN_MEMORY, initialize_pyrit_async


async def upload(request):
    form = await request.form()
    return PlainTextResponse(f"server got prompt={form['prompt']!r}")


app = Starlette(routes=[Route("/upload", upload, methods=["POST"])])

# multipart request as copied from Burp (CRLF line endings)
raw_request = (
    "POST /upload HTTP/1.1\r\n"
    "Host: example.com\r\n"
    "Content-Type: multipart/form-data; boundary=XyZ\r\n"
    "\r\n"
    "--XyZ\r\n"
    'Content-Disposition: form-data; name="prompt"\r\n'
    "\r\n"
    "{PROMPT}\r\n"
    "--XyZ--\r\n"
)


async def main():
    await initialize_pyrit_async(memory_db_type=IN_MEMORY)
    client = httpx.AsyncClient(transport=httpx.ASGITransport(app=app))
    target = HTTPTarget(http_request=raw_request, prompt_regex_string="{PROMPT}", client=client)
    response = await target.send_prompt_async(message=Message.from_prompt(prompt="hello", role="user"))
    print(response[0].get_value())


asyncio.run(main())
Expected Results
server got prompt='hello'
Actual Results
Invalid multipart data.

The body that gets sent is --XyZ\nContent-Disposition: form-data; name="prompt"\n\nhello\n--XyZ--\n, with no CR left.

Versions
  • OS: macOS 26.4.1 (arm64)
  • Python 3.13.16
  • PyRIT 1.2.0.dev0, main (672a8fc5), editable install

I have a fix that splits off the body before normalizing the header line endings. Happy to open a PR if that sounds right.

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