Go/stdlib CVE-2026-56862: high 7.5
Limit handshake messages we are willing to accept post-handshake in crypto/tls
Action: Upgrade stdlib to 1.25.13 or later.
Upgrade Go to 1.25.13.
Upgrade Go to 1.26.6.
Upgrade Go to 1.27.0-rc.3.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1.25.13 | - |
| 1.26.0-0 | 1.26.6 | - |
| 1.27.0-0 | - | - |
Fixed versions
| 1.25.13 | 1.26.6 | 1.27.0-rc.3 |
Sources
- osv: GO-2026-6090
- nvd: CVE-2026-56862
- https://go.dev/issue/80528
- https://go.dev/cl/804261
- https://groups.google.com/g/golang-announce/c/94pEornpRlI
CVE-2026-56862 · published · modified · JSON