IBM webMethods Integration (on prem): remote code execution

IBM webMethods Integration (on prem)

IBM webMethods Integration (on prem) 10.15, 10.11 could allow an unauthenticated remote attacker to execute arbitrary code on the system due to the deserialization of untrusted data.

Still cooking for webMethods Integration (on prem).

First seen: 29 Oct 2026
Last update: 29 Oct 2026, 12:17 UTC
Identifiers: CVE-2026-12118
CVSS: 9.8
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## IBM webMethods Integration (on prem): remote code execution
Severity: critical. Patch status: fix status unknown.
Affected: IBM webMethods Integration (on prem)
Ids: CVE-2026-12118

IBM webMethods Integration (on prem) 10.15, 10.11 could allow an unauthenticated remote attacker to execute arbitrary code on the system due to the deserialization of untrusted data.

## Steps
1. Search the repo, its CI and infra config for IBM webMethods Integration (on prem). If present, report the version in use and whether it's affected.
2. webMethods Integration (on prem) 10.15.x: the CVE record names no fix; check the vendor advisory before assuming there is none. Until one ships: restrict network access to it.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| webMethods Integration (on prem) 10.15.x | not named in the CVE record | check the vendor advisory: https://www.ibm.com/support/pages/node/7278857 | restrict network access to it |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-12118") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2026-12118 https://www.ibm.com/support/pages/node/7278857
https://pwned.coffee/i/ibm-webmethods-integration-on-prem-10-15-10-11-could-all-cve-2026-12118

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
webMethods Integration (on prem) = 10.15, 10.11 fix not named in the CVE record: see vendor advisory CVE record (CNA) checked 29 Oct
The CVE record names no fix for one line; the vendor’s advisory may: ibm.com
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (CNA ibm) for CVE-2026-12118
Last checked: 29 Oct 2026, 12:18 UTC

Product	Affected	Fixed in	Source
webMethods Integration (on prem)	= 10.15, 10.11	fix not named in the CVE record: see vendor advisory	CVE record (CNA) checked 29 Oct

Sources: KEV – CVE record ✓ Vendor ✓

Sources

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

Totalone very hot coffee