CVE-2026-32283
HIGH severity · CVSS 7.5 · Resource exhaustion
7.5CVSS HIGH
Summary
If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://go.dev/cl/763767 ↗
Additional information
- NVD record
- https://go.dev/cl/763767Patch
- https://pkg.go.dev/vuln/GO-2026-4870Advisory
- https://go.dev/issue/78334
- https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
- https://access.redhat.com/errata/RHSA-2026:10217
- https://access.redhat.com/errata/RHSA-2026:10219
- https://access.redhat.com/errata/RHSA-2026:10704
- https://access.redhat.com/errata/RHSA-2026:11507