Vulnerability · Published Oct 8, 2026 · Assigned by Go
CVE-2026-97032HTTP/2 server crash due to HPACK encoder race in net/http
High 7.5
In plain English
A high-severity race condition in net/http from Go standard library. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 57.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | delve | 1.26.1-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:10 | go-toolset | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | go-toolset | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | go-toolset | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang-bin | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang-bin | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang-bin | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang-docs | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang-docs | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang-docs | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang-misc | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang-misc | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang-misc | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang-race | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang-race | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang-race | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang-src | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang-src | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang-src | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| AlmaLinux:10 | golang-tests | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 |
| AlmaLinux:8 | golang-tests | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 |
| AlmaLinux:9 | golang-tests | 1.26.10-1.el9_8 | ALSA-2026:86196 |
| Alpine:v3.24 | docker | 29.9.0-r0 | ALPINE-CVE-2026-97032 |
| Alpine:v3.24 | go | 1.26.9-r0 | ALPINE-CVE-2026-97032 |
| Debian:12 | golang-1.19 | no fix listed | DEBIAN-CVE-2026-97032 |
| Debian:13 | golang-1.24 | no fix listed | DEBIAN-CVE-2026-97032 |
| Debian:14 | golang-1.26 | 1.26.9-1 | DEBIAN-CVE-2026-97032 |
| Debian:14 | golang-1.27 | 1.27.2-1 | DEBIAN-CVE-2026-97032 |
| Debian:12 | golang-golang-x-net | no fix listed | DEBIAN-CVE-2026-97032 |
| Debian:13 | golang-golang-x-net | no fix listed | DEBIAN-CVE-2026-97032 |
| Debian:14 | golang-golang-x-net | 1:0.60.0-1 | DEBIAN-CVE-2026-97032 |
| Go | golang.org/x/net | 0.60.0 | GO-2026-6617 |
| Go | stdlib | 1.26.9 | GO-2026-6617 |
| Go | stdlib | 1.27.2 | GO-2026-6617 |
| Ubuntu:22.04:LTS | adsys | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | adsys | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | adsys | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | adsys | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | containerd | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | containerd | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.17 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.18 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.20 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.21 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | golang-1.21 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.22 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | golang-1.22 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.23 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | golang-1.23 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | golang-1.23 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.24 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | golang-1.24 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | golang-1.24 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.25 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | golang-1.25 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | golang-1.25 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-1.26 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | golang-1.26 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | golang-1.26 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | golang-1.26 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | golang-1.27 | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | golang-golang-x-net | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | golang-golang-x-net | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | golang-golang-x-net | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | google-guest-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | google-guest-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | google-guest-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | google-guest-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:22.04:LTS | google-osconfig-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:24.04:LTS | google-osconfig-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.04:LTS | google-osconfig-agent | no fix listed | UBUNTU-CVE-2026-97032 |
| Ubuntu:26.10 | google-osconfig-agent | no fix listed | UBUNTU-CVE-2026-97032 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Go standard library | net/http | 0 – before 1.26.9 |
| Go standard library | net/http/internal/http2 | 1.27.0-0 – before 1.27.2 |
| golang.org/x/net | golang.org/x/net/http2 | 0 – before 0.60.0 |
Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H