Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add sanjaysaini1952/BugBounty-Arsenal --skill request-smugglinggit clone --depth 1 https://github.com/sanjaysaini1952/BugBounty-ArsenalWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/sanjaysaini1952/bugbounty-arsenal/request-smuggling)<a href="https://agentmods.dev/skills/sanjaysaini1952/bugbounty-arsenal/request-smuggling"><img src="https://agentmods.dev/badge/skills/sanjaysaini1952/bugbounty-arsenal/request-smuggling/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/sanjaysaini1952/bugbounty-arsenal/request-smuggling"><img src="https://agentmods.dev/badge/skills/sanjaysaini1952/bugbounty-arsenal/request-smuggling.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00310 |
| Opus 5 | $0.00000 | $0.00155 |
| Sonnet 5 | $0.00000 | $0.00062 |
| Haiku 4.5 | $0.00000 | $0.00031 |
Grade A, and why
request-smuggling scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
HTTP Request Smuggling Hunting Skill
Types
| Type | Description |
|---|---|
| CL.TE | Content-Length parsed by front-end, Transfer-Encoding by back-end |
| TE.CL | Transfer-Encoding parsed by front-end, Content-Length by back-end |
| TE.TE | Both parse Transfer-Encoding but disagree on implementation |
| CL.CL | Duplicate Content-Length headers |
| H2.CL | HTTP/2 to HTTP/1.1 downgrading smuggling |
Detection
cat alive.txt | python3 smuggler.py | tee smuggler_results.txt
Manual Detection
POST / HTTP/1.1
Host: target.com
Content-Length: 6
Transfer-Encoding: chunked
0
G
If front-end processes CL (6 bytes → "0\r\n\r\n") and back-end processes TE ("0" → end), the "G" is prepended to the next request.
H2.CL (HTTP/2)
# Send HTTP/2 request with:
# - :method POST
# - :path /
# - content-length: 6 (CL) but body is "0\r\n\r\nG"
# Back-end converts to HTTP/1.1 with the smuggled prefix
Impact
- Request smuggling → credential theft (other users' requests)
- Cache poisoning
- XSS injection into other users' requests
- WAF bypass
- Route manipulation
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 46 lines · 0 tokens per session scan A 4f4608d7d661
request-smuggling is a skill published in the GitHub repository sanjaysaini1952/BugBounty-Arsenal (2 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 310 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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