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Fix path traversal in GET /api/chat-modes/:modeId #44

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Merged
sbaker merged 1 commit into from
Apr 19, 2026
Merged

Fix path traversal in GET /api/chat-modes/:modeId #44

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5 changes: 5 additions & 0 deletions backend/src/routes/chatModes.js
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Original file line number Diff line number Diff line change
Expand Up @@ -95,9 +95,14 @@ router.get('/chat-modes', async (req, res) => {
* GET /api/chat-modes/:modeId
* Returns a specific chat mode configuration
*/
const VALID_MODE_ID = /^[a-z0-9][a-z0-9-]{0,63}$/

router.get('/chat-modes/:modeId', async (req, res) => {
try {
const { modeId } = req.params
if (!VALID_MODE_ID.test(modeId)) {
return res.status(400).json({ error: 'Invalid mode id' })
}
const filePath = path.join(PROMPTS_DIR, `${modeId}.json`)

const mode = await loadModeConfig(filePath)
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