---
id: "CVE-2026-118904"
page: "https://infrastack.ai/live/CVE-2026-118904"
kind: "vulnerability"
aliases: ["CVE-2026-118904"]
title: "IBM webMethods Integration Server 12.1: 2FA backup code validation flaw lets authenticated users bypass security restrictions"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "webMethods Integration Server", "fixed": ["IS_12.1_Core_Fix1"], "affected": "12.1", "ecosystem": "vendor"}]
ecosystems: []
tags: ["2fa", "ibm-webmethods", "integration-server", "self-hosted", "vendor"]
not_affected_if: ["auth-required"]
published_at: "2026-11-08T20:17:23+00:00"
first_seen_at: "2026-11-08T20:22:46+00:00"
updated_at: "2026-11-08T20:24:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118904", "first_seen_at": "2026-11-08T20:22:46+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/node/7295306", "first_seen_at": "2026-11-08T20:24:08+00:00", "cites": ["https://www.ibm.com/support/pages/node/7295306"]}]
exploit_sources: []
---

# IBM webMethods Integration Server 12.1: 2FA backup code validation flaw lets authenticated users bypass security restrictions

Link for people: https://infrastack.ai/live/CVE-2026-118904 (this .md is for agents)

IBM says webMethods Integration Server 12.1 (on prem) has a flaw in backup code validation during 2FA authentication (CWE-287). A remote attacker with valid credentials can bypass security restrictions. IBM rates it CVSS 8.1. IBM lists no workarounds.

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

## Affected

- vendor:webMethods Integration Server affected 12.1 fixed IS_12.1_Core_Fix1

## How to check

- Check whether you run IBM webMethods Integration Server 12.1 (the only version IBM lists) and whether 2FA with backup codes is used.
- Check the installed fixes in webMethods Update Manager for IS_12.1_Core_Fix1 or later; if absent, you are exposed.

## Fix

Apply IS_12.1_Core_Fix1 or later via IBM webMethods Update Manager and follow the fix readme. IBM lists no workarounds.

## Timeline

- 2026-11-08T20:22:46+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118904
- 2026-11-08T20:24:08+00:00 analyst https://www.ibm.com/support/pages/node/7295306 — Read IBM bulletin node/7295306 (3 Nov 2026): 12.1 affected, fix IS_12.1_Core_Fix1 or later, no workarounds. No exploitation or PoC checked beyond bulletin; X not searched.

## Documents

- [advisory] IBM Security Bulletin: webMethods Integration Server backup code validation during 2FA (CVE-2026-118904) https://www.ibm.com/support/pages/node/7295306

## From the sources

IBM webMethods Integration Server 12.1 could allow a remote authenticated attacker to bypass security restrictions due to improper authentication.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_