Vulnerability · Published Jul 30, 2026 · Assigned by ibm
CVE-2026-12118IBM webMethods Integration could allow an unauthenticated remote attacker to execute arbitrary code on the system due to the deserialization of untrusted data
Critical 9.8
In plain English
A critical-severity unsafe deserialization in webMethods Integration (on prem) from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 41.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| IBM | webMethods Integration (on prem) | 10.15, 10.11 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://www.ibm.com/support/pages/node/7278857 vendor-advisory, patch