High 7.5Published Apr 30, 2026

CVE-2025-51846CryptPad unbounded WebSocket frame flood

Updated under an hour ago (Oct 28, 2026, 1:50 AM ET)

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It affects CryptPad and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for CryptPad

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: cisa-cg
NVD analysis: Analyzed
Record last updated: Apr 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

CryptPad CryptPad cryptpad:cryptpad (from the name)	from 2025.3.1 before 2026.2.2; 2026.2.2 not affected	CNA record
xwiki cryptpad xwiki:cryptpad	from 2025.3.1 before 2026.2.2	NVD

References

References

https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e	patch
https://www.cve.org/CVERecord?id=CVE-2025-51846	third-party-advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json	third-party-advisory
https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/README.md	exploit, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.