CVE-2026-49252Critical· 9.9▾ Midnightdeepstream is vulnerable to prototype pollution
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 54.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.5%
Prototype pollution in deepstream server v <=10.0.4. Potential privilege escalation from any authenticated user with write permission to any record.
Yes, upgrade to v10.0.5
Filter out all messages containing the path __proto__, constructor, prototype, before they reach the server's message pipeline
@deepstream/server < 10.0.5Upgrade to a patched release:
@deepstream/server 10.0.5Connected by shared product, vendor, weakness, or advisory.
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