Medium File handling exploit reference

CVE-2026-15626 — nextlevelbuilder GoClaw ACP ToolBridge Workspace tool_bridge.go writeFile path traversal

A vulnerability was determined in nextlevelbuilder GoClaw 3.13.3-beta.3. This affects the function writeFile of the file internal/providers/acp/tool_bridge.go of the component ACP ToolBridge Workspace Handler. This manipulation causes path traversal. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

Published Jul 14, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (medium)+3
CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Nextlevelbuilder

GoClaw

CVSS base

6.3

Medium · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Nextlevelbuilder GoClaw).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (file handling), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Nextlevelbuilder	GoClaw	version 3.13.3-beta.3	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.3	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.1	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
6.3	CVSS 3.1	Medium	2.8	3.4	cna@vuldb.com via NIST National Vulnerability Database
6.3	CVSS 3.1	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
6.3	CVSS 3.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
6.5	CVSS 2.0	Medium	8.0	6.4	cna@vuldb.com via NIST National Vulnerability Database
6.5	CVSS 2.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-22 · Path Traversal

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Monitor file creation in web directories and paths with traversal sequences (../).

web/proxy/WAF logsnetwork IDS/IPSfile integrity (FIM)endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · nextlevelbuilder/goclaw
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 6.3
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Jul 14, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

7 on the record

vuldb.com/submit/855805
third-party-advisory, NIST National Vulnerability Database
github.com/nextlevelbuilder/goclaw/
product, NIST National Vulnerability Database
vuldb.com/vuln/378128/cti
signature, permissions-required, NIST National Vulnerability Database
github.com/nextlevelbuilder/goclaw/issues/1201
exploit, issue-tracking, NIST National Vulnerability Database
vuldb.com/vuln/378128
vdb-entry, technical-description, NIST National Vulnerability Database
github.com/nextlevelbuilder/goclaw/issues/1201
issue-tracking, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-15626
third-party-advisory, NIST National Vulnerability Database

Elsewhere on this site

Nextlevelbuilder
every CVE for this vendor

File handling
same class

CWE-22
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-18038 nextlevelbuilder GoClaw jq Handler tools_invoke.go ExecTool.Execute information disclosure Jul 28, 2026
Medium CVE-2026-16199 nextlevelbuilder GoClaw credentialed_exec.go ExecTool.Execute improper authorization Jul 18, 2026
Medium CVE-2026-16124 nextlevelbuilder GoClaw web_fetch web_shared.go isPrivateIP server-side request forgery Jul 18, 2026
Medium CVE-2026-16122 nextlevelbuilder GoClaw exec_approval.go matchesAllowlist authorization Jul 18, 2026
Medium CVE-2026-16123 nextlevelbuilder GoClaw Invoke Endpoint tools_invoke.go ToolsInvokeHandler.ServeHTTP authorization Jul 18, 2026
Medium CVE-2026-16121 nextlevelbuilder GoClaw exec_approval.go isSafeBin improper authorization Jul 18, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-15626 is "nextlevelbuilder GoClaw ACP ToolBridge Workspace tool_bridge.go writeFile path traversal", rated Medium. It affects GoClaw (Nextlevelbuilder); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.3 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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