Description
CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| CryptPad | CryptPad | 2025.3.1 – < 2026.2.2 | 2026.2.2 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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JohnPerifanis/cryptpad-cve-2025-51846-advisory ★ 0 · Apr 22, 2026
Sanitized advisory for CVE-2025-51846 affecting CryptPad WebSocket handling.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- VA-26-119-01 CryptPad unbounded WebSocket frame flood CISA ICS & IT advisories · Apr 29, 2026