---
id: "CVE-2026-113404"
kind: "vulnerability"
aliases: ["CVE-2026-113404"]
title: "WebITR: insecure deserialization lets authenticated users run code on server"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "WebITR", "fixed": ["2_1_0_36"], "affected": "<= 2_1_0_34", "ecosystem": "vendor"}]
ecosystems: []
tags: ["deserialization", "other", "rce", "self-hosted", "uniong", "webitr"]
not_affected_if: ["auth-required"]
published_at: "2026-10-20T07:17:09+00:00"
first_seen_at: "2026-10-23T21:57:20+00:00"
updated_at: "2026-10-24T00:18:00+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113404", "first_seen_at": "2026-10-23T21:57:20+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-24T00:18:00+00:00"}]
---

# WebITR: insecure deserialization lets authenticated users run code on server

Uniong WebITR deserializes untrusted data and the key is hard-coded. A logged-in attacker can craft serialized data and run code on the server. Affects 2_1_0_34 and earlier. Fixed in 2_1_0_36. Reported by Xin Yu Lin (DEVCORE).

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:WebITR affected <= 2_1_0_34 fixed 2_1_0_36

## How to check

Check the installed WebITR version in the admin UI or install directory. Versions 2_1_0_34 and earlier are vulnerable. The vendor page does not give a more specific check.

## Fix

Update WebITR to 2_1_0_36 or later. Until you can, limit network access to WebITR to trusted users only.

## Timeline

- 2026-10-23T21:57:20+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113404
- 2026-10-24T00:18:00+00:00 analyst — TWCERT/CC TVN-202610005 (primary coordinator page): WebITR 2_1_0_34 and earlier affected, fixed in 2_1_0_36. No exploitation or PoC found; no social search done (niche Taiwanese product). Ignored VulDB's description (calls WebITR an intrusion detection system, which looks wrong). Uniong's own page not found.

## Documents

- [advisory] TWCERT/CC TVN-202610005: Uniong WebITR - Insecure Deserialization https://www.twcert.org.tw/en/cp-139-11297-7c6f6-2.html
- [mentions] GitHub Advisory GHSA-jppw-qwg2-2hgc (CVE-2026-113404) https://github.com/advisories/GHSA-jppw-qwg2-2hgc

## From the sources

WebITR developed by Uniong has a Insecure Deserialization vulnerability. Authenticated remote attackers can use the hard-coded cryptographic key to craft and submit malicious serialized data, thereby executing arbitrary code on the server.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_