Medium severity · published Jun 23, 2026
CVE-2026-56402
NanoClaw < 2.1.17 - Privilege Escalation via Unverified Approval Response Handler
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
NanoClaw before 2.1.17 contains a privilege escalation vulnerability in the handleApprovalsResponse function that fails to verify responder role authorization. Attackers with a valid questionId can approve or reject privileged actions like package installation by submitting approval response payloads without proper role validation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NA
nanoclaw · nanocoai
before 2.1.17 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56402
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56402
github.com
https://github.com/nanocoai/nanoclaw/commit/6227bd1a5b016fb1eb76411bb6681b4c924a51a0
github.com
https://github.com/nanocoai/nanoclaw/pull/2478
www.vulncheck.com
https://www.vulncheck.com/advisories/nanoclaw-privilege-escalation-via-unverified-approval-response-handler
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