Vulnerability record
CVE-2026-110279
The short answer
CVE-2026-110279 affects IBM ContextForge MCP Gateway and is rated high (CVSS 8.1). It is not in CISA's Known Exploited Vulnerabilities catalog.
What it is
IBM ContextForge MCP Gateway 1.0.0 through 1.1.0 is vulnerable to improper credential handling because the X-Upstream-Authorization request header can override the gateway-managed upstream credential for OAuth (authorization_code and client_credentials), bearer and basic authenticated gateways, which could allow an authenticated user to cause upstream requests to be made with a different credential and bypass per-user permission and audit attribution.
Weakness: CWE-287.
Severity
8.1 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
No score
FIRST scores CVEs within a day of publication
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Affected products
ContextForge MCP Gateway. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-110279 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-14.
How do I fix CVE-2026-110279?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Awaiting Analysis. The description is NVD's text, quoted as published.
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