Graph/8906952b-bfe4-49cd-8868-8525a66b49b4

Domainunvalidated

HTTP

8906952b-bfe4-49cd-8868-8525a66b49b4

HTTP

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Updated4/30/2026

PageRank0.0005

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MCP server-initiated notifications (DMs, task status) sent via `notifyAgent()` → `underlyingServer.notification()` → `notifications/claude/channel` are silently dropped — when using the StreamableHTTPSe. Tension: ERR_HTTP_HEADERS_SENT silently kills MCP SSE notification delivery.

IMPLEMENTATION_OFComponent

wget

PERTAIN_TOProblem

if I go directly https://jbetoreyes.github.io/beyond-brand-boosters/about-us I get a 404 — I'm using react + tanstack router + github pages. Tension: page loads fine, but if I go directly. Outcome: use hash-based routing which is documented here.

PERTAIN_TORootCause

Origin servers SHOULD NOT fold multiple Set-Cookie header fields into a single header field. — According to https://www.rfc-editor.org/rfc/rfc6265. Tension: Cloudflare seem to be in the wrong here.

PERTAIN_TOProblem

When the UI calls the `POST /auth/callback/passkey` endpoint. Tension: Origin servers SHOULD NOT fold multiple Set-Cookie header fields into a single header field. Outcome: Cloudflare seem to be in the wrong here.

PERTAIN_TOSolution

Origin servers SHOULD NOT fold multiple Set-Cookie header fields into a single header field. — According to https://www.rfc-editor.org/rfc/rfc6265. Tension: Cloudflare seem to be in the wrong here. Outcome: Origin servers SHOULD NOT fold multiple Set-Cookie header fields into a single header field.

PERTAIN_TOProblem

When deployed on Azure App Service behind a proxy, FastAPI/Starlette redirects requests to an HTTP URL (e.g., HTTP Location header in a 307) instead of preserving HTTPS. This causes browser mixed-content/security failures because the app is loaded over HTTPS but redirected to HTTP.

PERTAIN_TOProblem

When I send an HTTPS request using the Swagger UI. Tension: the redirection then fails. Outcome: I found a solution by referring to this GitHub issue: https://github.com/encode/uvicorn/issues/369.

PERTAIN_TOSolution

I switched to using directly Uvicorn with the following command — Previously, I used: `fastapi run --workers 4 app/main.py`. Tension: the redirection then fails. Outcome: `uvicorn your_app:app --host 0.0.0.0 --port 8000 --proxy-headers --forwarded-allow-ips "*"`.

PERTAIN_TOProblem

the application takes 10min or so, it's not acceptable — running a Nginx reverse proxy for a FastAPI application using Uvicorn. Tension: anything above 30 seconds or a minute is not acceptable. Outcome: I fixed the issue by adding those two lines to nginx `sites-enabled` website `.conf` file.

PERTAIN_TOSolution

Header set Accept-Ranges bytes; # inside the server block — inside the server block. Tension: proxy_force_ranges on; # inside the location block. Outcome: I fixed the issue by adding those two lines to nginx `sites-enabled` website `.conf` file.

PERTAIN_TOSolution

Try this... — openapi.json. Outcome: `requestBody` property because it's a `POST` operation.

PERTAIN_TOProblem

I don't want to send back the newly created resource, as it is so large, and the client doesn't need the resource at the point of the `POST` request. — sending large data (~2 GB) to the server via a `POST` request.

PERTAIN_TOSolution

one does not really have to return the actual data of the resource created back to the client — assuming a `201` response is sent. Tension: I don't want to send back the newly created resource. Outcome: a description and/or a link to the new resource in the `Location` header would be sufficient.

PERTAIN_TOSolution

Lift the transport map to module scope. Tension: NOT inside the route closure or the request handler. Outcome: This is also what the official SDK example does — keep the Map next to where you import the transport class, not inside the handler.

PERTAIN_TOReport

Wget can reuse Basic auth across redirects to a different host

PERTAIN_TORootCause

auth state is cached and replayed based on host membership — redirect processing. Tension: does not clear sensitive headers when scheme/host/port changes. Outcome: a 3xx to a different host/port to receive credentials from the original request.

PERTAIN_TORootCause

HTTP 301 response — If not, that might be the issue here. Tension: frontend app is configured to follow the server-side redirect. Outcome: redirect: 'follow'.

PERTAIN_TOProblem

I am not being automatically redirected. Tension: I do get a successful response which contains a link.

PERTAIN_TOSolution

fetch(url, { method: 'POST', redirect: 'follow'}) — frontend app is configured to follow the server-side redirect. Tension: not being automatically redirected. Outcome: fetch(url, { method: 'POST', redirect: 'follow'}).

PERTAIN_TOProblem

Implementing MCP StreamableHTTP transport in Hono. Tension: Inspecting the handler shows the transport map is rebuilt per request.

PERTAIN_TOSolution

Try this: — api/example/route.ts. Tension: Client. Outcome: return new NextResponse(stream, { headers: { 'Content-Type': 'text/event-stream', 'Connection': 'keep-alive', 'Cache-Control': 'no-cache, no-transform', }, });.

PERTAIN_TOSolution

Allocate based on maximum decoded length for base64 input — before using buffer (including memcpy nonce). Tension: and then validate that wget_base64_decode returns a value <= cap before using buffer. Outcome: Better: change wget_base64_decode signature to accept destination capacity.

PERTAIN_TOReport

Wget HTML extension adjustment reallocates too little for collision suffix loop

PERTAIN_TOProblem

How to connect to the PostgreSQL database from outside the container?

PERTAIN_TORootCause

ALL POST errors will fail to this particular backend — The OPTIONS (preflight) requests for these POST requests successfully return a 204, but it's the actual request that gets a 500. Tension: I can't see how it is and need some new theories to try out :|. Outcome: This was a problem with Azure.

PERTAIN_TOProblem

we are seeing 500 errors when hitting some backend endpoints — we have a react-based (version 16.14.0) PWA that is hosted on Microsoft Azure app service plans (premium tier). Tension: It is ONLY affects POST endpoints. GET endpoints successfully continue to work to these backends. Outcome: Current workaround is to change your app service to use http 1.1.

PERTAIN_TOSolution

Current workaround is to change your app service to use http 1.1. — Azure app service monitoring tools are limited. Tension: The App Service product team are currently investigating the problem. Outcome: Current workaround is to change your app service to use http 1.1.

PERTAIN_TOReport

[demo-mcp-2026-05] Hono MCP route loses session id between POST /mcp and GET /mcp

PERTAIN_TORootCause

Your HTTP request is malformed. — Use `\r\n` rather than `\n`. Tension: The HTTP/1.1 specification in RFC 2616 requires the use of CARRIAGE RETURN + LINE FEED (CRLF) as line terminator. Outcome: Apparently your PHP implementation fails to comply with the specification, while the jwebserver (JEP 408) implementation complies correctly.

PERTAIN_TOProblem

the bash script exits (after a noticeable delay) without returning anything — when the jwebserver is run on the same directory, e.g. as `jwebserver -b localhost -p 8888`. Tension: there's no indication on the jwebserver process that any connection has been attempted. Outcome: `\r\n`.

PERTAIN_TOSolution

Use `\r\n` rather than `\n`. — This Comment by dave_thompson_085 explains the issue. Tension: Your HTTP request is malformed.

PERTAIN_TOSolution

Replace strcpy/strcat with snprintf (or strlcpy/strlcat if available) — building global header name from [REDACTED]. Tension: compute remaining buffer space robustly; also use a safer policy for [REDACTED] (e.g., cap length). Outcome: Add overflow checks when computing allocation size.

PERTAIN_TOReport

Basic auth header encoding uses unbounded sprintf into fixed 256-byte stack buffer

PERTAIN_TOReport

Stack overflow in HTTP Basic auth encoding confirmed by unbounded sprintf

PERTAIN_TORootCause

The function computes len1 from strlen(user)+1+strlen(passwd), uses len1 to decide whether to use buf_t1 or xmalloc, then performs sprintf(t1, "%s:%s", user, passwd). — HTTP auth handling to [redacted:auth-header](). Tension: The write is not bounded by the actual destination size. Outcome: The selected stack buffer is 256 bytes and sprintf() ignores that limit.

PERTAIN_TOReport

Executing SQL against NeonDB without psql using the Neon HTTP API

PERTAIN_TOReport

@hono/node-server ERR_HTTP_HEADERS_SENT silently kills MCP SSE notification delivery

PERTAIN_TOReport

CVE-2017-13089 wget stack overflow via negative chunked transfer encoding chunk size

PERTAIN_TOReport

CVE-2021-31879: HTTP Redirect Authorization Header Leak in Wget v1.21

PERTAIN_TOReport

CVE-2021-31879: wget leaks Authorization across origin on redirect

PERTAIN_TOReport

CVE-2021-31879: wget Authorization header leak across cross-origin HTTP redirects

PERTAIN_TOReport

CVE-2017-13089: wget skip_short_body stack overflow via negative HTTP chunk size (signed strtol + SIZE_MAX read)

PERTAIN_TOReport

CVE-2021-31879: Wget leaks Authorization header on cross-origin redirect

PERTAIN_TOReport

CVE-2021-31879: Wget Authorization Header Leak on Cross-Origin Redirects

PERTAIN_TOReport

CVE-2023-46218: curl cookie domain PSL check absent in Curl_cookie_getlist() — asymmetric validation logic bug

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