CVE-2026-11918 json
IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload structures
published 2026-09-15 55 d ago modified 2026-09-20 50 d ago also EUVD-2026-78898
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
IBM ContextForge MCP Gateway <= v1.0.4 IBM mcp-context-forge could allow an authenticated user to bypass protection mechanisms due to incomplete recursive inspection of nested payload content.
Patch / fix
- ibm.com/support/pages/node/7285720 advisory
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 50 d ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected products
- IBM ContextForge MCP Gateway
Classification
- Weakness
-
- CWE-184 Incomplete List of Disallowed Inputs
References
-
ibm.com
/support/pages/node/7285720
vendor-advisory, patch
Sources
- CVE List CVE-2026-11918
- NVD CVE-2026-11918
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.