CVE-2026-32283 Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-32283?
CVE-2026-32283 is a high-severity vulnerability in Golang Go, published on 8 Apr 2026.
Official description
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.
Which versions are affected by CVE-2026-32283?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.25.9, 1.26.2 |
stdlib Go | All versions | 1.25.9, 1.26.2 |
Linux distribution packages (9)
go-fdo-client AlmaLinux:10 | All versions | 1.0.0-3.el10_2 |
grafana-pcp Red Hat:enterprise_linux:10.1 | All versions | 0:5.3.0-4.el10_1 |
grafana-pcp-debuginfo Red Hat:enterprise_linux:10.1 | All versions | 0:5.3.0-4.el10_1 |
grafana-pcp-debugsource Red Hat:enterprise_linux:10.1 | All versions | 0:5.3.0-4.el10_1 |
go-fdo-client Red Hat:enterprise_linux:10.2 | All versions | 0:1.0.0-3.el10_2 |
go-fdo-client-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:1.0.0-3.el10_2 |
go-fdo-client-debugsource Red Hat:enterprise_linux:10.2 | All versions | 0:1.0.0-3.el10_2 |
go-fdo-client Rocky Linux:10 | All versions | 0:1.0.0-3.el10_2 |
grafana-pcp Rocky Linux:10 | All versions | 0:5.3.0-4.el10_1 |
Products include Golang Go.
How do I fix CVE-2026-32283?
Upgrade golang to a fixed version for your release line: 1.25.9 or 1.26.2.
Is CVE-2026-32283 being exploited?
There is no known exploitation of CVE-2026-32283 in the wild and no public exploit code.
Other vulnerabilities in Golang Go
- CVE-2020-0601 Microsoft Windows CryptoAPI Spoofing
- CVE-2026-27143 Missing bound checks can lead to memory corruption in safe Go in cmd/compile
- CVE-2024-24790 Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip
- CVE-2023-39320 Arbitrary code execution via go.mod toolchain directive in cmd/go
- CVE-2023-24540 Improper handling of JavaScript whitespace in html/template
Sources
Also known as ALSA-2026:19139, AZL-98625, BELL-CVE-2026-32283, BIT-golang-2026-32283, CLEANSTART-2026-CM47213, CLEANSTART-2026-DX00522 and 658 more.