CVE-2026-97031
Published:October 08, 2026
Updated:October 09, 2026
Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.
Affected Packages
https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1.24.0 <go1.26.9Fix Suggestion:
Update to version go1.26.9https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1.27.0 <go1.27.2Fix Suggestion:
Update to version go1.27.2github.com/golang/go (GO):
Affected version(s) >=go1.27.0 <go1.27.2Fix Suggestion:
Update to version go1.27.2github.com/golang/go (GO):
Affected version(s) >=go1.24.0 <go1.26.9Fix Suggestion:
Update to version go1.26.9Related Resources (5)
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Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH