Vulnerability Report: GO-2026-6607
- CVE-2026-97031
- Affects: crypto/tls
- Published: Oct 08, 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
-
PathVersionsSymbols
-
before go1.26.9, from go1.27.0-0 before go1.27.2
Aliases
References
- https://go.dev/cl/847312
- https://go.dev/issue/81855
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
- https://vuln.go.dev/ID/GO-2026-6607.json
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