CVE-2026-33810
Vulnerability Summary
Timeline
Description
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.
CVSS Metrics
- v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- v3.1•HIGH•Score: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L
EPSS Trends
Current EPSS score: 0.34%• Percentile: 28%
Techniques & Countermeasures
- CWE-295•Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
- CWE-1289•Improper Validation of Unsafe Equivalence in Input
The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.
Affected Systems
- chainguard•actions-runner-controller
< 0.14.1-r0
- chainguard•actions-runner-controller-fips
< 0.14.1-r0
- chainguard•age
< 0
- chainguard•apko
< 1.2.15-r0
- chainguard•atlas-1.0
< 1.0.0-r3
- chainguard•atlas-1.0-fips
< 1.0.0-r6
- chainguard•atlas-1.1-fips
< 1.1.0-r3
- chainguard•aws-eks-pod-identity-agent-fips
< 0.1.37-r1
- chainguard•aws-iam-authenticator
< 0.7.16-r1
- chainguard•aws-load-balancer-controller
< 3.2.1-r0
- chainguard•aws-network-policy-agent
< 1.3.2-r2
- chainguard•aws-privateca-issuer
< 1.8.1-r7
- chainguard•aws-privateca-issuer-fips
< 1.8.1-r1
- chainguard•boringssl-fips-static-2023042800-tools
< 0
- chainguard•boringssl-fips-static-20240407-tools
< 0
- chainguard•chainguard-partners-demo
< 0
- chainguard•cilium-certgen-fips-0.4
< 0.4.1-r1
- chainguard•cilium-fips-1.16
< 1.16.19-r7
- chainguard•cilium-fips-1.16-clustermesh-apiserver
< 1.16.19-r7
- chainguard•cilium-fips-1.16-host-utils
< 1.16.19-r7
- chainguard•cilium-fips-1.16-hubble-relay
< 1.16.19-r7
- chainguard•cilium-fips-1.16-operator-aws
< 1.16.19-r7
- chainguard•cilium-fips-1.16-operator-azure
< 1.16.19-r7
- chainguard•cilium-fips-1.16-operator-generic
< 1.16.19-r7
- chainguard•cilium-fips-1.17
< 1.17.16-r1
- chainguard•cilium-fips-1.17-clustermesh-apiserver
< 1.17.16-r1
- chainguard•cilium-fips-1.17-host-utils
< 1.17.16-r1
- chainguard•cilium-fips-1.17-hubble-relay
< 1.17.15-r0 | < 1.17.16-r1
- chainguard•cilium-fips-1.17-operator-aws
< 1.17.15-r0 | < 1.17.16-r1
- chainguard•cilium-fips-1.17-operator-azure
< 1.17.16-r1 | < 1.17.15-r0
- chainguard•cilium-fips-1.17-operator-generic
< 1.17.16-r1
- chainguard•cilium-fips-1.18
< 1.18.10-r2
- chainguard•cilium-fips-1.18-clustermesh-apiserver
< 1.18.10-r2
- chainguard•cilium-fips-1.18-host-utils
< 1.18.10-r2
- chainguard•cilium-fips-1.18-hubble-relay
< 1.18.10-r2
- chainguard•cilium-fips-1.18-operator-aws
< 1.18.10-r2
- chainguard•cilium-fips-1.18-operator-azure
< 1.18.10-r2
- chainguard•cilium-fips-1.18-operator-generic
< 1.18.10-r2
- chainguard•clickhouse-operator
< 0.27.0-r2
- chainguard•clickhouse-operator-metrics-exporter
< 0.27.0-r2
- chainguard•commercial-chainloop-backend
< 1.61.1-r0
- chainguard•commercial-chainloop-cli
< 1.61.1-r0
- chainguard•commercial-expanso-edge
< 2.1.19-r0
- chainguard•dapr-daprd-fips-1.17
< 1.17.5-r0
- chainguard•dapr-injector-fips-1.17
< 1.17.5-r0
- chainguard•dapr-operator-fips-1.17
< 1.17.5-r0
- chainguard•dapr-placement-fips-1.17
< 1.17.5-r0
- chainguard•dapr-scheduler-fips-1.17
< 1.17.5-r0
- chainguard•dapr-sentry-fips-1.17
< 1.17.5-r0
- chainguard•dataplaneapi
< 3.3.2-r2
Showing first 50 affected entries in server-rendered view.
References (95)
- https://go.dev/cl/763763
- https://go.dev/issue/78332
- https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
- https://pkg.go.dev/vuln/GO-2026-4866
- http://www.openwall.com/lists/oss-security/2026/04/19/4
- http://www.openwall.com/lists/oss-security/2026/04/20/1
- https://access.redhat.com/security/cve/CVE-2026-33810
- https://bugzilla.redhat.com/show_bug.cgi?id=2456335
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33810.json
- https://access.redhat.com/errata/RHSA-2026:14391
- https://access.redhat.com/errata/RHSA-2026:28047
- https://access.redhat.com/errata/RHSA-2026:19719
- https://access.redhat.com/errata/RHSA-2026:19144
- https://access.redhat.com/errata/RHSA-2026:19135
- https://access.redhat.com/errata/RHSA-2026:19721
- https://access.redhat.com/errata/RHSA-2026:19720
- https://access.redhat.com/errata/RHSA-2026:19353
- https://access.redhat.com/errata/RHSA-2026:25089
- https://access.redhat.com/errata/RHSA-2026:26585
- https://access.redhat.com/errata/RHSA-2026:22862
- https://access.redhat.com/errata/RHSA-2026:22347
- https://access.redhat.com/errata/RHSA-2026:21769
- https://access.redhat.com/errata/RHSA-2026:23345
- https://access.redhat.com/errata/RHSA-2026:29854
- https://access.redhat.com/errata/RHSA-2026:26568
- https://access.redhat.com/errata/RHSA-2026:26571
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:7291
- https://access.redhat.com/errata/RHSA-2026:22485
- https://access.redhat.com/errata/RHSA-2026:10155
- https://access.redhat.com/errata/RHSA-2026:10158
- https://access.redhat.com/errata/RHSA-2026:21772
- https://access.redhat.com/errata/RHSA-2026:9385
- https://access.redhat.com/errata/RHSA-2026:24478
- https://access.redhat.com/errata/RHSA-2026:22960
- https://access.redhat.com/errata/RHSA-2026:22958
- https://access.redhat.com/errata/RHSA-2026:22962
- https://access.redhat.com/errata/RHSA-2026:22959
- https://access.redhat.com/errata/RHSA-2026:22961
- https://access.redhat.com/errata/RHSA-2026:34365
- https://access.redhat.com/errata/RHSA-2026:36796
- https://access.redhat.com/errata/RHSA-2026:36651
- https://access.redhat.com/errata/RHSA-2026:39810
- https://access.redhat.com/errata/RHSA-2026:40945
- https://access.redhat.com/errata/RHSA-2026:40118
- https://access.redhat.com/errata/RHSA-2026:41928
- https://access.redhat.com/errata/RHSA-2026:42043
- https://access.redhat.com/errata/RHSA-2026:42047
- https://access.redhat.com/errata/RHSA-2026:42050
- https://access.redhat.com/errata/RHSA-2026:42051
- https://access.redhat.com/errata/RHSA-2026:42049
- https://access.redhat.com/errata/RHSA-2026:47952
- https://access.redhat.com/errata/RHSA-2026:51033
- https://security-tracker.debian.org/tracker/CVE-2026-33810
- https://access.redhat.com/errata/RHSA-2026:54757
- https://access.redhat.com/errata/RHSA-2026:51288
- https://access.redhat.com/errata/RHSA-2026:34192
- https://access.redhat.com/errata/RHSA-2026:34196
- https://access.redhat.com/errata/RHSA-2026:34197
- https://access.redhat.com/errata/RHSA-2026:57126
- https://access.redhat.com/security/updates/classification/#important
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57126.json
- https://www.cve.org/CVERecord?id=CVE-2026-33810
- https://nvd.nist.gov/vuln/detail/CVE-2026-33810
- https://access.redhat.com/errata/RHSA-2026:19714
- https://access.redhat.com/errata/RHSA-2026:59546
- https://access.redhat.com/errata/RHSA-2026:49703
- https://access.redhat.com/errata/RHSA-2026:49702
- https://access.redhat.com/errata/RHSA-2026:56143
- https://access.redhat.com/errata/RHSA-2026:57649
- https://access.redhat.com/errata/RHSA-2026:49712
- https://access.redhat.com/errata/RHSA-2026:56223
- https://access.redhat.com/errata/RHSA-2026:61313
- https://access.redhat.com/errata/RHSA-2026:61253
- https://access.redhat.com/errata/RHSA-2026:61907
- https://access.redhat.com/errata/RHSA-2026:62577
- https://access.redhat.com/errata/RHSA-2026:62578
- https://access.redhat.com/errata/RHSA-2026:63332
- https://pkg.go.dev
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33810.json
- https://access.redhat.com/errata/RHSA-2026:65534
- https://access.redhat.com/errata/RHSA-2026:65359
- https://access.redhat.com/errata/RHSA-2026:65880
- https://access.redhat.com/errata/RHSA-2026:65126
- https://access.redhat.com/errata/RHSA-2026:66327
- https://access.redhat.com/errata/RHSA-2026:65895
- https://access.redhat.com/errata/RHSA-2026:67134
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67134.json
- https://access.redhat.com/errata/RHSA-2026:67149
- https://access.redhat.com/errata/RHSA-2026:67160
- https://access.redhat.com/errata/RHSA-2026:67159
- https://access.redhat.com/errata/RHSA-2026:67517
- https://access.redhat.com/errata/RHSA-2026:67518
- https://access.redhat.com/errata/RHSA-2026:68334
- https://access.redhat.com/errata/RHSA-2026:68504