IBM webMethods Integration Server is affected by vulnerabilty in backup code validation during 2FA Authentication.
Only IBM webMethods Integration Server 12.1 with two-factor authentication using backup codes is covered. CVSS scores it 8.1 High, and no vendor rating is given. Fixed in IS_12.1_Core_Fix1.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in IS_12.1_Core_Fix1
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Product is IBM webMethods Integration Server 12.1 Two-factor authentication using backup codes is in use
- Published
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 16/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
IBM webMethods Integration Server has a flaw in how it checks backup codes during two-factor authentication, which could let an attacker bypass security restrictions. An attacker can exploit this remotely over the network with low-privilege login credentials and no user interaction.
Read the original description
IBM webMethods Integration Server 12.1 could allow a remote authenticated attacker to bypass security restrictions due to improper authentication.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.1/10CVSS 8.1
- No patch0/5No signal
What would change the score
- Would score about 66 if added to CISA KEV
- Would score about 61 if CISA's SSVC rates exploitation active
- Would score about 23 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Product is IBM webMethods Integration Server 12.1 Two-factor authentication using backup codes is in useUpgrade to a fixed version: IS_12.1_Core_Fix1.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- IBM webMethods Integration Server
12.1
Evidence 1
- Patch
Corrections
None so far.
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Questions about CVE-2026-118904
Is CVE-2026-118904 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
Backup codes used for two-factor authentication are not validated correctly. This improper authentication can let a remote authenticated user bypass security restrictions.Source: ibm.com
Which versions are affected by CVE-2026-118904?
webMethods Integration Server: version 12.1.Source: cve.now feed data
Am I affected, and how do I check?
Affects IBM webMethods Integration Server 12.1 where two-factor authentication using backup codes is in use. Check the installed Integration Server version and whether backup codes are enabled for 2FA.Source: ibm.com
How do I fix CVE-2026-118904?
Upgrade to IS_12.1_Core_Fix1 or later, the fix version listed for this issue.Source: ibm.com