CVE & CISA-KEV Catalog

CVE-2026-33810

MEDIUM
5.9
CVSS v3
NVD

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.

CWE-295Improper Certificate ValidationCWE-1289

How to fix

Remediation Available
candlepinRed Hat / RHEL
Fixed in:0:4.7.5-1.el9satRHSA-2026:34365
Fixed in:0:4.7.5-1.el9satRHSA-2026:34365
candlepinRocky
Fixed in:0:4.7.5-1.el9satRHSA-2026:34365
Fixed in:0:4.7.5-1.el9satRHSA-2026:34365
candlepin-selinuxRed Hat / RHEL
Fixed in:0:4.7.5-1.el9satRHSA-2026:34365
candlepin-selinuxRocky
Fixed in:0:4.7.5-1.el9satRHSA-2026:34365
collectd-sensubilityRocky
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
collectd-sensubilityRed Hat / RHEL
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
collectd-sensubility-debuginfoRed Hat / RHEL
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
collectd-sensubility-debuginfoRocky
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
Fixed in:0:0.2.1-1.1.el8ostRHSA-2026:54757
cryostat/cryostatRocky
Fixed in:rhel9-operator@sha256:c4a8388737cd5330176421462353b4253dcbf4c7dc963b644b5d122cda3022d1_arm64RHSA-2026:14391
Fixed in:storage-rhel9@sha256:95938fed3fcf7e786bcc418e5cc05999519336dd9b1ae26ac09b87d122244ce9_amd64RHSA-2026:14391
Fixed in:rhel9-operator@sha256:b3c9c59b462a94d181b51ee7419c5e89618da06bb70d7905f7efeeca12e57c6b_amd64RHSA-2026:14391
Fixed in:operator-bundle@sha256:5479230ed1ace22b8f00141796326cae84a772b1b6f14f52a58366a9695266da_amd64RHSA-2026:14391
Fixed in:rhel9@sha256:548ef61d03e7b861bed4b2f86cb826add8fcf13251d34562a4ac78302eae9d88_amd64RHSA-2026:14391
Fixed in:reports-rhel9@sha256:fb4b8f8338d6f3b7458ec9643d49175333a69d15650f026a1038836668f0c076_amd64RHSA-2026:14391
Fixed in:db-rhel9@sha256:8c6ca482631927526d6e8d1ca455cffc379d798c7d8d323c699e7ffc5ff44c88_amd64RHSA-2026:14391
Fixed in:storage-rhel9@sha256:95c41160b310ef0c54ddab4fd77dfaf02faf62de58d15b3a90b375c76226181c_arm64RHSA-2026:14391
cryostat/cryostatRed Hat / RHEL
Fixed in:db-rhel9@sha256:231d5f0956e242c675b2f33df01d7a1fd9f44c9ee80f2b05731a60e0022e1483_arm64RHSA-2026:14391
Fixed in:reports-rhel9@sha256:71ff61b5a765e62ef16bd633580dc9d49e8fcb46a68c3ee0e831d161b598956a_arm64RHSA-2026:14391
Fixed in:db-rhel9@sha256:8c6ca482631927526d6e8d1ca455cffc379d798c7d8d323c699e7ffc5ff44c88_amd64RHSA-2026:14391
Fixed in:rhel9@sha256:6daca9dff828394e3181355526276fdc6448eace218fc3c30b63b992bee5424d_arm64RHSA-2026:14391
Fixed in:operator-bundle@sha256:b2a02cd673f7dd96218aa92a11bb924eb4538060f77fb8e773d0f13f5bdec55f_arm64RHSA-2026:14391
Fixed in:rhel9-operator@sha256:c4a8388737cd5330176421462353b4253dcbf4c7dc963b644b5d122cda3022d1_arm64RHSA-2026:14391
Fixed in:storage-rhel9@sha256:95c41160b310ef0c54ddab4fd77dfaf02faf62de58d15b3a90b375c76226181c_arm64RHSA-2026:14391
Fixed in:storage-rhel9@sha256:95938fed3fcf7e786bcc418e5cc05999519336dd9b1ae26ac09b87d122244ce9_amd64RHSA-2026:14391
cryostat/cryostat-agentRocky
Fixed in:init-rhel9@sha256:f2aeac65f02f6d21b497972087a808104100b547d92ab1a5656d91b48262c97d_amd64RHSA-2026:14391
Fixed in:init-rhel9@sha256:f0b40e2312ae2659f9d0092a98488d7c5965ab33efe759ce78778b1b8173c5d6_arm64RHSA-2026:14391
cryostat/cryostat-agentRed Hat / RHEL
Fixed in:init-rhel9@sha256:f0b40e2312ae2659f9d0092a98488d7c5965ab33efe759ce78778b1b8173c5d6_arm64RHSA-2026:14391
Fixed in:init-rhel9@sha256:f2aeac65f02f6d21b497972087a808104100b547d92ab1a5656d91b48262c97d_amd64RHSA-2026:14391
cryostat/cryostat-grafanaRed Hat / RHEL
Fixed in:dashboard-rhel9@sha256:e0092c9adc9bf671729ec2a4682f3c53f1f12a9fdf09edf5f5c4b65172e04742_amd64RHSA-2026:14391
Fixed in:dashboard-rhel9@sha256:2e68b360df2e9532458e97127a16e10765c3e7bbe4842d6ad48febca834af1f2_arm64RHSA-2026:14391
cryostat/cryostat-grafanaRocky
Fixed in:dashboard-rhel9@sha256:2e68b360df2e9532458e97127a16e10765c3e7bbe4842d6ad48febca834af1f2_arm64RHSA-2026:14391
Fixed in:dashboard-rhel9@sha256:e0092c9adc9bf671729ec2a4682f3c53f1f12a9fdf09edf5f5c4b65172e04742_amd64RHSA-2026:14391
cryostat/cryostat-openshift-consoleRed Hat / RHEL
Fixed in:plugin-rhel9@sha256:03b2d5ec8747fa2984b4659b0d61c5dd67dd729c6957918752b8033a3e6f40ec_arm64RHSA-2026:14391
Fixed in:plugin-rhel9@sha256:5d356babef136df86f11f77ec595d9e9cc9a7f246eeb458e062757e273a9e803_amd64RHSA-2026:14391
cryostat/cryostat-openshift-consoleRocky
Fixed in:plugin-rhel9@sha256:03b2d5ec8747fa2984b4659b0d61c5dd67dd729c6957918752b8033a3e6f40ec_arm64RHSA-2026:14391
Fixed in:plugin-rhel9@sha256:5d356babef136df86f11f77ec595d9e9cc9a7f246eeb458e062757e273a9e803_amd64RHSA-2026:14391
cryostat/jfrRocky
Fixed in:datasource-rhel9@sha256:965a1522fc45c8aeff07508ba9291919bd007318da0511ee2ed4e4c18190ec71_amd64RHSA-2026:14391
Fixed in:datasource-rhel9@sha256:914d1985a1944cf4c25530b67aad321e7a8d6f28cfb7793b703b69456deecf8a_arm64RHSA-2026:14391
cryostat/jfrRed Hat / RHEL
Fixed in:datasource-rhel9@sha256:965a1522fc45c8aeff07508ba9291919bd007318da0511ee2ed4e4c18190ec71_amd64RHSA-2026:14391
Fixed in:datasource-rhel9@sha256:914d1985a1944cf4c25530b67aad321e7a8d6f28cfb7793b703b69456deecf8a_arm64RHSA-2026:14391
erlangRed Hat / RHEL
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlangRocky
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-asn1Rocky
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-asn1Red Hat / RHEL
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-asn1-debuginfoRocky
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-asn1-debuginfoRed Hat / RHEL
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-compilerRocky
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-compilerRed Hat / RHEL
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-cryptoRed Hat / RHEL
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-cryptoRocky
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-crypto-debuginfoRocky
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
erlang-crypto-debuginfoRed Hat / RHEL
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757
Fixed in:0:23.3.4.18-2.el8ostRHSA-2026:54757

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityHigh
AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

0.34%probability of exploitation in 30 days
27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Patch1
Vendor Advisory1
Issue Tracking1
Mailing List1

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2015-4000Low3.7100%-Fix
CVE-2020-0601High8.189%KEVFix
CVE-2009-3555Critical9.887%-Fix
CVE-2022-26923High8.884%KEVFix
CVE-2023-27823Critical9.853%--
CVE-2022-42979High8.824%--

Common questions

How do I fix CVE-2026-33810?

Published advisories record a fix for 475 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-33810 being actively exploited?

Not that we know of. CVE-2026-33810 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 27% of all scored CVEs.

How severe is CVE-2026-33810?

CVE-2026-33810 has a CVSS v3 base score of 5.9, rated moderate. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-33810 affect?

Published advisories record a fix for candlepin (Red Hat / RHEL), candlepin (Rocky), candlepin-selinux (Red Hat / RHEL), candlepin-selinux (Rocky), and 471 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-25.