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Fencer Intel
high 7.5

CVE-2026-97032 json

HTTP/2 server crash due to HPACK encoder race in net/http

published last mo. modified 26d ago also BIT-golang-2026-97032 , EUVD-2026-95429 , GO-2026-6617

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami golang 1.26.9, 1.27.2
  • go stdlib 1.26.9, 1.27.2
  • go golang.org/x/net 0.60.0
  • Go standard library net/http 1.26.9
  • Go standard library net/http/internal/http2 1.27.2
  • golang.org/x/net golang.org/x/net/http2 0.60.0
  • golang-1.26 Debian 14 1.26.9-1
  • golang-1.27 Debian 14 1.27.2-1
  • golang-golang-x-net Debian 14 1:0.60.0-1

debian advisories DEBIAN-CVE-2026-97032

  • kubevirt SLE Module for Containers 15 SP7 1.7.4-150700.3.42.1
  • google-cloud-sap-agent SLES for SAP applications 16.0, SLES 16.0 3.15-160000.5.1
  • google-guest-agent Linux Micro 6.0 20261022.00-159998.1.1
  • google-guest-agent Linux Micro 6.1 20261022.00-slfo.1.1_1.1
  • go1.26-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.26.10-150000.1.21.2
  • go1.26-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 1.26.10-150600.13.18.1
  • go1.26 SLES for SAP applications 16.0, SLES 16.0 1.26.9-160000.1.1
  • go1.27 SLES for SAP applications 16.0, SLES 16.0 1.27.2-160000.1.1

suse advisories SUSE-SU-2026:5167-1SUSE-SU-2026:24604-1SUSE-SU-2026:24475-1SUSE-SU-2026:24555-1SUSE-SU-2026:4867-1SUSE-SU-2026:4866-1

  • distribution openSUSE Tumbleweed 3.1.2-5.1
  • alloy openSUSE Tumbleweed 1.21.3-1.1
  • google-extension-manager openSUSE Tumbleweed 20261105.00-1.1
  • google-cloud-sap-agent openSUSE Leap 16.0 3.15-160000.5.1
  • kubevirt1.9 openSUSE Leap 16.0 1.9.1-160000.1.1
  • gosec openSUSE Leap 16.0 2.30.0-bp160.1.1
  • cadvisor openSUSE Leap 16.0 0.60.6-bp160.3.1
  • trivy openSUSE Leap 16.0 0.76.1-160000.1.1

opensuse advisories openSUSE-SU-2026:12495-1openSUSE-SU-2026:12446-1openSUSE-SU-2026:12456-1openSUSE-SU-2026:22236-1openSUSE-SU-2026:22180-1openSUSE-SU-2026:22197-1

  • golang AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • go-toolset AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • golang-bin AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • golang-src AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • golang-misc AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • golang-race AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • golang-tests AlmaLinux 10 1.26.10-1.el10_2.alma.1
  • golang AlmaLinux 9 1.26.10-1.el9_8

almalinux advisories ALSA-2026:86093ALSA-2026:86196ALSA-2026:86203

  • go Alpine 3.24 1.26.9-r0
  • docker Alpine 3.24 29.9.0-r0

alpine advisories ALPINE-CVE-2026-97032

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • application-gateway-kubernetes-ingress Azure Linux 3.0 1.7.7-7
  • azurelinux-image-tools Azure Linux 3.0 1.7.0-2
  • cert-manager Azure Linux 3.0 1.12.15-15
  • cloud-provider-kubevirt Azure Linux 3.0 0.5.1-10
  • containerd2 Azure Linux 3.0 2.3.7-1
  • containerized-data-importer Azure Linux 3.0 1.62.0-9
  • coredns Azure Linux 3.0 1.11.4-23
  • docker-buildx Azure Linux 3.0 0.14.0-19

azure linux advisories AZL-107144AZL-107171AZL-107183AZL-107222AZL-107237AZL-107258

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-97032 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-97032 updated cvss 5.9

net/http: net/http/internal/http2: golang: golang.org/x/net/http2: net/http: Denial of Service via concurrent HPACK encoder modification

  • Red Hat OpenShift Developer Tools and Services helm 3.22.0-90.el9
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift Pipelines openshift-pipelines-client 1.15.3-11580.el8 Red Hat OpenShift Serverless kn-workflow-plugin 1.38.1-1.el9, openshift-serverless-clients 1.17.0-4.el9 Red Hat OpenShift Service Mesh 3 istio-proxy-selinux, istio-proxy 1.30.5-1.el9, openshift-golang-builder-container
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Ansible Automation Platform 2 receptor 1.6.8-1.el9ap, automation-gateway-proxy 2.6.17-3.el9ap, automation-gateway-proxy-openssl30 2.6.6-2.el9ap, automation-gateway-proxy-openssl32 2.6.6-2.el9ap
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat Ceph Storage 7 thrift Red Hat Ceph Storage 8 thrift, thrift-qt, perl-thrift, thrift-glib, python3-thrift Red Hat Ceph Storage 9 thrift, libarrow, parquet-libs Red Hat Certification Program for Red Hat Enterprise Linux 9 redhat-certification-cnf 9.0-20240522.1.el9, redhat-certification-preflight 9.42-20261005.el10 Red Hat Edge Manager 1 flightctl 1.2.1-1.el9 Red Hat Enterprise Linux 7 rhc, host-metering, rhc-worker-script, rhc 0.3.13-1.el10_3, host-metering-selinux, compat-sap-c++-11 11.1.1-6.el7_9
    +8 more products
    Red Hat Enterprise Linux 8 rhc, crun, runc, conmon, podman, skopeo, +43 more Red Hat Enterprise Linux 9 rhc, delve, butane, conmon, podman, skopeo, +50 more Red Hat Enterprise Linux 10 toolbox 0.3-3.el10, rhc 0.3.13-1.el10_3, butane 0.29.0-1.el10, conmon 2.1.12-4.el10, delve 1.26.1-2.el10_0, podman 5.8.2-9.el10_2, +20 more Red Hat Enterprise Linux AI (RHEL AI) 3 golang 1.25.1-1.el9 Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-mod-arch-automl-rhel9, +24 more Red Hat OpenShift Container Platform 4 cri-o, butane, conmon, podman, skopeo, toolbox, +63 more Red Hat OpenShift Container Platform 5 cri-o, conmon-rs, cri-tools, openshift, microshift, kata-containers, +6 more Red Hat OpenShift on AWS rosa 1.2.64-b2f7c89.el8
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift Virtualization 4 openshift-golang-builder-container
    affected: workaround, no fix available
  • Red Hat OpenStack Platform 16.2 etcd, golang-github-infrawatch-apputils 0.5-3.git4ffa970.el8ost Red Hat OpenStack Platform 17.1 etcd, golang-uber-multierr, collectd-libpod-stats, golang-uber-atomic 1.5.1-1.el8ost.1, golang-github-infrawatch-apputils 0.5-3.git4ffa970.el8ost
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 18.0 etcd, golang-github-openstack-k8s-operators-os-diff 0.1.1-18.0.20260602234717.a95ae05.el9ost Red Hat Satellite 6 yggdrasil-worker-forwarder 0.1.0-2.1.el9sat
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Service Interconnect 1 skupper-cli 1.8.8-1.el9
    affected: workaround, no fix planned “Out of support scope”
show 15 more
  • Red Hat Service Interconnect 2 skupper-cli 1.8.8-1.el9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat streams for Apache Kafka 2 golang-github-danielqsj-kafka_exporter 1.9.0-12.el9
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat streams for Apache Kafka 3 golang-github-danielqsj-kafka_exporter 1.9.0-12.el9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 8) delve 1.26.1-1.module+el8.10.0+24516+40554724, golang 1.26.10-1.module+el8.10.0+25107+6b50279c, go-toolset 1.26.10-1.module+el8.10.0+25107+6b50279c, golang-bin 1.26.10-1.module+el8.10.0+25107+6b50279c, golang-src 1.26.10-1.module+el8.10.0+25107+6b50279c, golang-misc 1.26.10-1.module+el8.10.0+25107+6b50279c, +2 more
    fixed: vendor fix RHSA-2026:86203
  • Red Hat Enterprise Linux AppStream (v. 9) golang 1.26.10-1.el9_8, go-toolset 1.26.10-1.el9_8, golang-bin 1.26.10-1.el9_8, golang-src 1.26.10-1.el9_8, golang-misc 1.26.10-1.el9_8, golang-race 1.26.10-1.el9_8, +1 more
    fixed: vendor fix RHSA-2026:86196
  • Red Hat Enterprise Linux AppStream (v. 10) golang 1.26.10-1.el10_2, go-toolset 1.26.10-1.el10_2, golang-bin 1.26.10-1.el10_2, golang-src 1.26.10-1.el10_2, golang-misc 1.26.10-1.el10_2, golang-race 1.26.10-1.el10_2, +1 more
    fixed: vendor fix RHSA-2026:86093
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) delve 1.26.1-1.module+el8.4.0+25181+7ce5b91c, golang 1.26.10-2.module+el8.4.0+25201+9a419e96, go-toolset 1.26.10-2.module+el8.4.0+25201+9a419e96, golang-bin 1.26.10-2.module+el8.4.0+25201+9a419e96, golang-src 1.26.10-2.module+el8.4.0+25201+9a419e96, golang-misc 1.26.10-2.module+el8.4.0+25201+9a419e96, +2 more
    fixed: vendor fix RHSA-2026:90994
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) delve 1.26.1-1.module+el8.6.0+24782+a062e766, golang 1.26.10-4.module+el8.6.0+25114+90ecdb41, go-toolset 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-bin 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-src 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-misc 1.26.10-4.module+el8.6.0+25114+90ecdb41, +2 more
    fixed: vendor fix RHSA-2026:87246
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) delve 1.26.1-1.module+el8.8.0+24781+86ad105d, golang 1.26.10-4.module+el8.8.0+25113+a148ecc0, go-toolset 1.26.10-4.module+el8.8.0+25113+a148ecc0, golang-bin 1.26.10-4.module+el8.8.0+25113+a148ecc0, golang-src 1.26.10-4.module+el8.8.0+25113+a148ecc0, golang-misc 1.26.10-4.module+el8.8.0+25113+a148ecc0, +2 more
    fixed: vendor fix RHSA-2026:87245
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) golang 1.26.10-1.el9_2, go-toolset 1.26.10-1.el9_2, golang-bin 1.26.10-1.el9_2, golang-src 1.26.10-1.el9_2, golang-misc 1.26.10-1.el9_2, golang-race 1.26.10-1.el9_2, +1 more
    fixed: vendor fix RHSA-2026:87041
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) golang 1.26.10-1.el9_4, go-toolset 1.26.10-1.el9_4, golang-bin 1.26.10-1.el9_4, golang-src 1.26.10-1.el9_4, golang-misc 1.26.10-1.el9_4, golang-race 1.26.10-1.el9_4, +1 more
    fixed: vendor fix RHSA-2026:87042
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) golang 1.26.10-1.el10_0, go-toolset 1.26.10-1.el10_0, golang-bin 1.26.10-1.el10_0, golang-src 1.26.10-1.el10_0, golang-misc 1.26.10-1.el10_0, golang-race 1.26.10-1.el10_0, +1 more
    fixed: vendor fix RHSA-2026:87040
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) golang 1.26.10-1.el9_6, go-toolset 1.26.10-1.el9_6, golang-bin 1.26.10-1.el9_6, golang-src 1.26.10-1.el9_6, golang-misc 1.26.10-1.el9_6, golang-race 1.26.10-1.el9_6, +1 more
    fixed: vendor fix RHSA-2026:87043
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) delve 1.26.1-1.module+el8.4.0+25181+7ce5b91c, golang 1.26.10-2.module+el8.4.0+25201+9a419e96, go-toolset 1.26.10-2.module+el8.4.0+25201+9a419e96, golang-bin 1.26.10-2.module+el8.4.0+25201+9a419e96, golang-src 1.26.10-2.module+el8.4.0+25201+9a419e96, golang-misc 1.26.10-2.module+el8.4.0+25201+9a419e96, +2 more
    fixed: vendor fix RHSA-2026:90994
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) delve 1.26.1-1.module+el8.6.0+24782+a062e766, golang 1.26.10-4.module+el8.6.0+25114+90ecdb41, go-toolset 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-bin 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-src 1.26.10-4.module+el8.6.0+25114+90ecdb41, golang-misc 1.26.10-4.module+el8.6.0+25114+90ecdb41, +2 more
    fixed: vendor fix RHSA-2026:87246

6 more fixed, 5 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
27d ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami golang
<1.26.9
>=1.27.0-0, <1.27.2
1.26.9
1.27.2
go stdlib
<1.26.9
>=1.27.0-0, <1.27.2
1.26.9
1.27.2
go golang.org/x/net
<0.60.0
0.60.0

Affected products

  • Go standard library net/http
  • Go standard library net/http/internal/http2
  • golang.org/x/net golang.org/x/net/http2

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.