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CVE-2026-10219· NVD / CVE Program· CNA VulDB

nextlevelbuilder GoClaw write_file Tool fsbridge.go FsBridge.WriteFile os command injection

A vulnerability was found in nextlevelbuilder GoClaw up to 3.11.3. This impacts the function FsBridge.WriteFile of the file internal/sandbox/fsbridge.go of the component write_file Tool. Performing a manipulation results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The pull request to fix this issue awaits acceptance.

MediumCVSS 5.5 · v4.0—No exploit No fix recorded

Noroxi analysis

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Published
Jun 1, 2026
Updated
Jul 22, 2026
EPSS
1.3% · 70th percentile
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Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulDB
6.9
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

  • nextlevelbuilder GoClaw

    • 3.11.0, 3.11.1, 3.11.2, 3.11.3affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Gogithub.com/nextlevelbuilder/goclawup to and including 3.11.3—
Gogithub.com/nextlevelbuilder/goclawall versions—

Same product

nextlevelbuilder: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-10617nextlevelbuilder GoClaw Webhook Verification auth.go resolveAuth missing authentication
    22Monitor
  • CVE-2026-7505nextlevelbuilder GoClaw/GoClaw Lite RPC improper authorization
    22Monitor
  • CVE-2026-18038nextlevelbuilder GoClaw jq Handler tools_invoke.go ExecTool.Execute information disclosure
    8Monitor
  • CVE-2026-16199nextlevelbuilder GoClaw credentialed_exec.go ExecTool.Execute improper authorization
    8Monitor
  • CVE-2026-16124nextlevelbuilder GoClaw web_fetch web_shared.go isPrivateIP server-side request forgery
    8Monitor
  • CVE-2026-16123nextlevelbuilder GoClaw Invoke Endpoint tools_invoke.go ToolsInvokeHandler.ServeHTTP authorization
    8Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records