High severity · published Apr 10, 2026
CVE-2026-35670
OpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat
8.1
CVSS
0.2%
EPSS
No
On KEV
Description
OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% 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-2026-35670
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35670
Patch
https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87
Patch
https://github.com/openclaw/openclaw/commit/7ade3553b74ee3f461c4acd216653d5ba411f455
Vendor Advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-wv46-v6xc-2qhf
Third Party Advisory
https://www.vulncheck.com/advisories/openclaw-webhook-reply-rebinding-via-username-resolution-in-synology-chat
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