nanocoai NanoClaw up to 2.1.16 Installation handleApprovalsResponse authorization

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k1.60-

Summaryinfo

A vulnerability described as problematic has been identified in nanocoai NanoClaw up to 2.1.16. The affected element is the function handleApprovalsResponse of the component Installation Handler. The manipulation results in authorization. This vulnerability is reported as CVE-2026-56402. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in nanocoai NanoClaw up to 2.1.16. Affected is the function handleApprovalsResponse of the component Installation Handler. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity. CVE summarizes:

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.

The weakness was disclosed by Chia Min Jun Lennon. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-56402 since 06/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available.

Upgrading to version 2.1.17 eliminates this vulnerability. Applying the patch 6227bd1a5b016fb1eb76411bb6681b4c924a51a0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-862 / CWE-863 / CWE-285
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: NanoClaw 2.1.17
Patch: 6227bd1a5b016fb1eb76411bb6681b4c924a51a0

Timelineinfo

06/21/2026 CVE reserved
06/23/2026 +2 days Advisory disclosed
06/23/2026 +0 days VulDB entry created
06/23/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Chia Min Jun Lennon
Status: Confirmed

CVE: CVE-2026-56402 (🔒)
GCVE (CVE): GCVE-0-2026-56402
GCVE (VulDB): GCVE-100-372972

Entryinfo

Created: 06/23/2026 23:33
Changes: 06/23/2026 23:33 (79)
Complete: 🔍
Cache ID: 216::103

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