Vulnerability GO-2026-6607
Unknown
UNKNOWN RISK
Vulnerabilities without an assigned CVSS score. Severity is not determinable from available data.
8 hours ago
October 08, 2026 at 10:31 PM UTC
Reject malformed ECH outer extension references in crypto/tls
<1.26.9
<1.26.9
Summary
Reject malformed ECH outer extension references in crypto/tls
Details
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.
References
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Impacted packages
Timeline
Published
8 hours ago
October 08, 2026 at 10:31 PM UTC
Last Modified
8 hours ago
October 08, 2026 at 10:45 PM UTC