GO-2026-6607
Reject malformed ECH outer extension references in crypto/tls
At a glance
- Published
- Updated
- CVE
- CVE-2026-97031
- Aliases
- BIT-golang-2026-97031
Description
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
| Package | Versions |
|---|---|
| Go · stdlib | introduced 0, fixed 1.26.9, introduced 1.27.0-0, fixed 1.27.2 |
References
- https://go.dev/cl/847312 FIX
- https://go.dev/issue/81855 REPORT
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |