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01 Record

CVE-2026-18905

IBM ContextForge MCP Gateway is affected by server-side request forgery via DNS TOCTOU at tool invocation

HighPUBLISHEDCNA: ibm
CNA base score7.7 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

02 Description

IBM ContextForge MCP Gateway is affected by server-side request forgery via DNS TOCTOU at tool invocation

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.46% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 40.0% of scored records. A rank, not a probability.
NVD base score
7.7 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-09-15.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-04 15:56Z1 MO AGO
Last updated
2026-09-04 18:24Z1 MO AGO
Reserved
2026-08-04
Assigning CNA
ibm
Record state
PUBLISHED
Severity
High (CVSS 7.7)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weaknesses
  • CWE-918Server-Side Request Forgery (SSRF)Base
Data version
5.2
Document digest
b48cdd8314dd884707a1d258e9062738ce7cfb0f19ce782300917fcc9a6cf6cb

05 Affected products

VendorProductVersionsPlatforms

06 References

07 Remediation

IBM strongly recommends addressing the vulnerability now. Product(s)Version(s) number and/or range Remediation/Fix/InstructionsIBM ContextForge MCP Gateway<=v1.0.6 https://github.com/IBM/mcp-context-forge/pull/5925_