nanocoai NanoClaw up to 2.1.17 Attachment agent-route.ts forwardAttachedFiles link following

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.7$0-$5k1.45+

Summaryinfo

A vulnerability marked as critical has been reported in nanocoai NanoClaw up to 2.1.17. Impacted is the function forwardAttachedFiles of the file src/modules/agent-to-agent/agent-route.ts of the component Attachment Handler. This manipulation causes link following. The identification of this vulnerability is CVE-2026-90807. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as critical was found in nanocoai NanoClaw up to 2.1.17. Affected by this vulnerability is the function forwardAttachedFiles of the file src/modules/agent-to-agent/agent-route.ts of the component Attachment Handler. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-90807. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch 3f9ed607b7e7a4872747295f75286f1c377d7c33 is able to eliminate this problem. The bugfix is ready for download at github.com.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 3f9ed607b7e7a4872747295f75286f1c377d7c33

Timelineinfo

09/13/2026 Advisory disclosed
09/13/2026 +0 days VulDB entry created
09/13/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 2828
Status: Confirmed

CVE: CVE-2026-90807 (🔒)
GCVE (CVE): GCVE-0-2026-90807
GCVE (VulDB): GCVE-100-403309
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/13/2026 18:05
Changes: 09/13/2026 18:05 (60)
Complete: 🔍
Submitter: Eric-a
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #922841: nanocoai nanoclaw <= 2.1.17 Improper Link Resolution Before File Access / Link Following (CWE-59) (by Eric-a)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!