High severity · published Apr 9, 2026
CVE-2026-35627
OpenClaw < 2026.3.22 - Unauthenticated Cryptographic Work in Nostr Inbound DM Handling
8.2
CVSS
0.5%
EPSS
No
On KEV
Description
OpenClaw before 2026.3.22 performs cryptographic and dispatch operations on inbound Nostr direct messages before enforcing sender and pairing policy validation. Attackers can trigger unauthorized pre-authentication computation by sending crafted DM messages, enabling denial of service through resource exhaustion.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenClaw · OpenClaw
before 2026.3.22 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35627
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35627
Patch
https://github.com/openclaw/openclaw/commit/1ee9611079e81b9122f4bed01abb3d9f56206c77
Patch
https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87
Vendor Advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-65h8-27jh-q8wv
Third Party Advisory
https://www.vulncheck.com/advisories/openclaw-unauthenticated-cryptographic-work-in-nostr-inbound-dm-handling
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