CVE-2026-113382: arizu-id fast-tunnel advisory

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

A security vulnerability has been detected in arizu-id fast-tunnel 1.0.0. Affected by this issue is the function ZipArchive::extractTo of the file backend/api_plugins.php of the component Plugin Installer. Such manipulation of the argument plugin_file leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 1.0.1 can resolve this issue. The name of the patch is 04573681420295f7b327c9da3b101aed2f3cf432. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Description quoted from the CVE record (assigned by VulDB, published 2026-10-20).

Weakness: Unrestricted Upload; Improper Access Controls

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing low privileges and no user interaction. Impact: confidentiality low, integrity low, availability low. CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Exploit Observer found 3 code repositories naming this CVE.

Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.

See all 6 references on Exploit Observer

Live scores

EPSS: 0.003
low predicted chance of attack
VEDAS: 0.987
strong exploit evidence
On CISA KEV: Not listed
Detection rule: Suricata

Who is affected

Product	Affected	Not affected
arizu-id fast-tunnel	version 1.0.0	1.0.1 is not affected

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

Vendor guidance:

How to detect it

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-113382 Fast-Tunnel - Unrestricted File Upload Attempt. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-113382 Fast-Tunnel - Unrestricted File Upload Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"api_plugins.php"; nocase; fast_pattern; http.request_body; content:"plugin_file"; nocase; classtype:web-application-attack; reference:cve,CVE-2026-113382; reference:url,https://www.exploit.observer/?keyword=CVE-2026-113382&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=fast-tunnel&match=exact; sid:1084002; rev:1;)

CVE-2026-113382.rules on GitHub

References

Vendor advisories and patches

Technical analysis and advisories

VDB-422655 | arizu-id fast-tunnel Plugin Installer api_plugins.php extractTo unrestricted upload (vdb-entry, technical-description)
CVE-2026-113382 | CVE Analysis and Report (third-party-advisory)
Submit #990501 | arizu-id fast-tunnel v1.0.0 Unrestricted Upload of File with Dangerous Type, CWE-434 (third-party-advisory)

Other references

VDB-422655 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
https://github.com/arizu-id/fast-tunnel/ (product)

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.