Impacts IBM webMethods, a widely used enterprise integration platform; unauthenticated RCE can disrupt enterprise systems and integrations.
CVE-2026-12118
Unauthenticated remote RCE in IBM webMethods Integration (on-prem).
Is CVE-2026-12118 being exploited?
Not confirmed. CVE-2026-12118 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.57% probability of exploitation in the next 30 days.
How severe is CVE-2026-12118?
CVE-2026-12118 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-12118?
Yes. A fix has been recorded for CVE-2026-12118. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-12118 affect?
CVE-2026-12118 affects IBM webMethods Integration (on-prem) 10.11, IBM webMethods Integration (on-prem) 10.15. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-12118?
Apply vendor patch immediately; if unavailable, isolate servers and restrict network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote attackers can execute arbitrary code via deserialization of untrusted data, leading to full system compromise.
Immediate action required
- affected10.15, 10.11
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.