[Bug] Claude Code security review false positive on CORS origin validation code

Bug Description
Read(/home/serve
r/index.js · lines 60-121)
⎿  Read 62 lines

● Commit security review found 4 issues:
Cross-Site WebSocket Hijacking → Remote Code
Execution in server/index.js; Arbitrary
filesystem directory disclosure via /api/dirs
in server/index.js; CSRF → stored arbitrary
command execution via /api/workspaces in
server/index.js; +1 more

● Update(/home/ser
ver/index.js)
⎿  Added 13 lines
16 const saveWorkspaces = (ws)
=>
17 writeFileSync(DB_PATH, JSO
N.stringify(ws, null, 2))
18
19 +// origens permitidas (dev V
+ite + same-origin quando ser
+vido pelo próprio server)
20 +const ALLOWED_ORIGINS = new
+Set([
21 + 'http://localhost:5173',
22 + 'http://127.0.0.1:5173',
23 + http://localhost:${PORT}
+,
24 + http://127.0.0.1:${PORT}
+,
25 +])
26 +const originOk = (req) => {
27 + const origin = req.headers
+.origin
28 + // requests sem Origin (cu
+rl, mesmo processo) são loca
+is; browsers sempre mandam
29 + return !origin || ALLOWED_
+ORIGINS.has(origin)
30 +}
31 +
32 const readBody = (req) =>
33 new Promise((resolve) => {
34 let raw = ''

● Fable 5's safety measures flagged this
message for cybersecurity or biology
topics. They may flag safe, normal content
as well. These measures let us bring you
Mythos-level capability in other areas
sooner, and we're working to refine them.
Switched to Opus 4.8. Send feedback with
/feedback or learn more
⎿ Tip: You can configure model switch
behavior in /config

Environment Info

• Platform: linux
• Terminal: gnome-terminal
• Version: 2.1.170
• Feedback ID: 8400f3f7-10e0-4af8-91eb-8b665b99f18a

Errors

[]