CVE-2026-33810
Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509
CVE-2026-33810 is fixed in 41 products on 2 platforms, first by Go Programming Language 1.26.2, released April 7, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
9.1
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0035
28th percentile
When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Go Programming Language | 1.26.2 | Go Programming Language 1.26.2 | Apr 7, 2026 |
| Linux | |||
| buildah · RHEL 10 | 1.43.1-5.el10_2 | RHSA-2026:63332 | May 7, 2026 |
| buildah · almalinux 10 | 2:1.43.1-5.el10_2 | ALSA-2026:63332 | Sep 3, 2026 |
| buildah · ol 10 | 2:1.43.1-5.0.1.el10_2 | ELSA-2026-63332-0 | Sep 4, 2026 |
| buildah · rocky 10 | 2:1.43.1-5.el10_2 | RLSA-2026:63332 | Sep 4, 2026 |
| buildah-tests · almalinux 10 | 2:1.43.1-5.el10_2 | ALSA-2026:63332 | Sep 3, 2026 |
| buildah-tests · ol 10 | 2:1.43.1-5.0.1.el10_2 | ELSA-2026-63332-0 | Sep 4, 2026 |
| delve · RHEL 10 | 1.26.1-1.el10_0 | RHSA-2026:49703 | Apr 30, 2026 |
| flightctl · RHEL 10 | 1.1.4-1.el10em | RHSA-2026:68334 | Sep 17, 2026 |
| git-lfs · RHEL 10 | 3.6.1-2.el10_0.7 | RHSA-2026:67149 | Jun 30, 2026 |
| git-lfs · RHEL 9 | 0:3.7.1-4.el9_8 | RHSA-2026:19350 | May 15, 2026 |
| git-lfs · almalinux 9 | 3.7.1-4.el9_8 | ALSA-2026:19350 | May 19, 2026 |
| go-fdo-client · RHEL 10 | 1.0.0-4.el10_2.7 | RHSA-2026:62577 | Sep 4, 2026 |
| go-fdo-client · almalinux 10 | 1.0.0-4.el10_2.7 | ALSA-2026:62577 | Sep 2, 2026 |
| go-fdo-client · ol 10 | 0:1.0.0-4.el10_2.7 | ELSA-2026-62577-0 | Sep 2, 2026 |
| go-fdo-client · rocky 10 | 0:1.0.0-4.el10_2.7 | RLSA-2026:62577 | Sep 3, 2026 |
| go-fdo-server · RHEL 10 | 1.0.1-2.el10_2.4 | RHSA-2026:62578 | Sep 3, 2026 |
| go-fdo-server · almalinux 10 | 1.0.1-2.el10_2.4 | ALSA-2026:62578 | Sep 2, 2026 |
| go-fdo-server · ol 10 | 0:1.0.1-2.el10_2.4 | ELSA-2026-62578-0 | Sep 2, 2026 |
| go-fdo-server · rocky 10 | 0:1.0.1-2.el10_2.4 | RLSA-2026:62578 | Sep 3, 2026 |
| go-fdo-server-manufacturer · almalinux 10 | 1.0.1-2.el10_2.4 | ALSA-2026:62578 | Sep 2, 2026 |
| go-fdo-server-manufacturer · ol 10 | 0:1.0.1-2.el10_2.4 | ELSA-2026-62578-0 | Sep 2, 2026 |
| go-fdo-server-owner · almalinux 10 | 1.0.1-2.el10_2.4 | ALSA-2026:62578 | Sep 2, 2026 |
| go-fdo-server-owner · ol 10 | 0:1.0.1-2.el10_2.4 | ELSA-2026-62578-0 | Sep 2, 2026 |
| go-fdo-server-rendezvous · almalinux 10 | 1.0.1-2.el10_2.4 | ALSA-2026:62578 | Sep 2, 2026 |
| go-fdo-server-rendezvous · ol 10 | 0:1.0.1-2.el10_2.4 | ELSA-2026-62578-0 | Sep 2, 2026 |
| go-toolset · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| go-toolset · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| go-toolset · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| go1.26 · opensuse-leap 16.0 | 1.26.2-160000.1.1 | OPENSUSE-SU-2026:20571-1 | Apr 20, 2026 |
| go1.26 · sles 15.6 | 1.26.2-150000.1.9.1 | SUSE-SU-2026:1320-1 | Apr 14, 2026 |
| go1.26 · sles 15.7 | 1.26.2-150000.1.9.1 | SUSE-SU-2026:1320-1 | Apr 14, 2026 |
| go1.26-openssl · opensuse-leap 16.0 | 1.26.4-160000.1.1 | OPENSUSE-SU-2026:21254-1 | Jul 7, 2026 |
| go1.26-openssl · sles 16.0 | 1.26.4-160000.1.1 | SUSE-SU-2026:22572-1 | Jul 7, 2026 |
| golang · RHEL 10 | 1.26.5-1.el10_0 | RHSA-2026:49702 | May 27, 2026 |
| golang · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| golang-1.26 · Debian 14 | 1.26.2-1 | DEBIAN-CVE-2026-33810 | Apr 8, 2026 |
| golang-bin · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang-bin · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang-bin · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| golang-docs · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang-docs · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang-docs · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| golang-github-openprinting-ipp-usb · RHEL 10 | 0.9.27-7.el10_2 | RHSA-2026:19144 | Apr 8, 2026 |
| golang-github-openprinting-ipp-usb · rocky 10 | 0:0.9.27-7.el10_2 | RLSA-2026:19144 | May 29, 2026 |
| golang-misc · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang-misc · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang-misc · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| golang-race · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang-race · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang-race · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| golang-src · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang-src · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang-src · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| golang-tests · RHEL 9 | 0:1.26.2-1.el9_8 | RHSA-2026:19181 | May 27, 2026 |
| golang-tests · almalinux 10 | 1.26.2-2.el10_2.alma.1 | ALSA-2026:19022 | May 19, 2026 |
| golang-tests · almalinux 9 | 1.26.2-1.el9_8 | ALSA-2026:19181 | May 19, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
| grafana · RHEL 10 | 10.2.6-26.el10_0 | RHSA-2026:67517 | Jul 6, 2026 |
| grafana-pcp · RHEL 10 | 5.3.0-1.el10_0 | RHSA-2026:56143 | Jun 2, 2026 |
| ignition · RHEL 10 | 2.21.0-2.el10_0.3 | RHSA-2026:59546 | May 22, 2026 |
| image-builder · RHEL 10 | 52.1-1.el10_2.2 | RHSA-2026:65534 | Sep 10, 2026 |
| image-builder · ol 10 | 0:72.0.0-1.0.2.el10 | ELSA-2026-65534-0 | Sep 11, 2026 |
| image-builder · rocky 10 | 0:52.1-1.el10_2.2.rocky.0.1 | RLSA-2026:65534 | Sep 9, 2026 |
| ipp-usb · ol 10 | 0:0.9.27-7.el10_2.2 | ELSA-2026-19144 | Jul 17, 2026 |
| opentelemetry-collector · RHEL 10 | 0.144.0-2.el10_0 | RHSA-2026:19719 | Apr 8, 2026 |
| opentelemetry-collector · RHEL 9 | 0:0.144.0-2.el9_8 | RHSA-2026:19353 | May 27, 2026 |
| opentelemetry-collector · almalinux 10 | 0.144.0-2.el10_2 | ALSA-2026:19135 | May 19, 2026 |
| opentelemetry-collector · almalinux 9 | 0.144.0-2.el9_8 | ALSA-2026:19353 | May 19, 2026 |
| opentelemetry-collector · rocky 10 | 0:0.144.0-2.el10_2 | RLSA-2026:19135 | May 29, 2026 |
| opentelemetry-collector · rocky 9 | 0:0.144.0-2.el9_8 | RLSA-2026:19353 | May 28, 2026 |
| osbuild-composer · RHEL 10 | 134.1-12.el10_0 | RHSA-2026:66327 | Sep 10, 2026 |
| osbuild-composer · ol 10 | 0:176-1.0.2.el10_2 | ELSA-2026-65895-0 | Sep 11, 2026 |
| osbuild-composer · rocky 10 | 0:165.1-3.el10_2.2.rocky.0.1 | RLSA-2026:65895 | Sep 10, 2026 |
| osbuild-composer-core · ol 10 | 0:176-1.0.2.el10_2 | ELSA-2026-65895-0 | Sep 11, 2026 |
| osbuild-composer-worker · ol 10 | 0:176-1.0.2.el10_2 | ELSA-2026-65895-0 | Sep 11, 2026 |
| podman · RHEL 10 | 5.8.2-9.el10_2 | RHSA-2026:70201 | Aug 18, 2026 |
| podman · almalinux 10 | 7:5.8.2-9.el10_2.alma.1 | ALSA-2026:70201 | Sep 22, 2026 |
| podman · ol 10 | 7:5.8.2-9.0.1.el10_2 | ELSA-2026-70201 | Sep 23, 2026 |
| podman · rocky 10 | 7:5.8.2-9.el10_2 | RLSA-2026:70201 | Sep 23, 2026 |
| podman-docker · almalinux 10 | 7:5.8.2-9.el10_2.alma.1 | ALSA-2026:70201 | Sep 22, 2026 |
| podman-docker · ol 10 | 7:5.8.2-9.0.1.el10_2 | ELSA-2026-70201 | Sep 23, 2026 |
| podman-remote · almalinux 10 | 7:5.8.2-9.el10_2.alma.1 | ALSA-2026:70201 | Sep 22, 2026 |
| podman-remote · ol 10 | 7:5.8.2-9.0.1.el10_2 | ELSA-2026-70201 | Sep 23, 2026 |
| podman-tests · almalinux 10 | 7:5.8.2-9.el10_2.alma.1 | ALSA-2026:70201 | Sep 22, 2026 |
| podman-tests · ol 10 | 7:5.8.2-9.0.1.el10_2 | ELSA-2026-70201 | Sep 23, 2026 |
| rhc · RHEL 10 | 0.3.2-6.el10_0 | RHSA-2026:61313 | May 7, 2026 |
| rhc-worker-playbook · RHEL 10 | 0.2.3-5.el10_0 | RHSA-2026:19714 | Apr 8, 2026 |
| yggdrasil · RHEL 10 | 0.4.7-6.el10_0 | RHSA-2026:67134 | Apr 8, 2026 |
| yggdrasil · almalinux 10 | 0.4.9.2-1.el10_2.2 | ALSA-2026:57126 | Aug 19, 2026 |
| yggdrasil · ol 10 | 0:0.4.9.2-1.el10_2.2 | ELSA-2026-57126 | Aug 19, 2026 |
| yggdrasil · rocky 10 | 0:0.4.9.2-1.el10_2.2 | RLSA-2026:57126 | Aug 20, 2026 |
| yggdrasil-devel · almalinux 10 | 0.4.9.2-1.el10_2.2 | ALSA-2026:57126 | Aug 19, 2026 |
| yggdrasil-devel · ol 10 | 0:0.4.9.2-1.el10_2.2 | ELSA-2026-57126 | Aug 19, 2026 |
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