Critical severity · published Sep 4, 2026
CVE-2026-77822
IBM ContextForge MCP Gateway is affected by server-side request forgery (DNS rebinding) via the A2A agent invocation endpoint
9.6
CVSS
0.4%
EPSS
No
On KEV
Description
IBM ContextForge MCP Gateway could allow a remote authenticated attacker to obtain sensitive information due to server-side request forgery via DNS rebinding.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
ContextForge MCP Gateway · IBM
<= v1.0.8 · source: vendor
CO
Contextforge · Ibm
through 1.0.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77822
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77822
Patch
https://www.ibm.com/support/pages/node/7286055
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