Vulnerability-Lookup

RHSA-2026:86595

Vulnerability from csaf_redhat - Published: 2026-10-21 03:06 - Updated: 2026-10-23 00:44

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Critical

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: ca-certificates: * ca-certificates-2026.2.92_v9.0.319-1.hum1 (noarch) * ca-certificates-bundle-2026.2.92_v9.0.319-1.hum1 (noarch) * ca-certificates-2026.2.92_v9.0.319-1.hum1.src (src)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-114406

The system certificate authority (CA) store in Red Hat products, distributed via ca-certificates RPM packages, included multiple root CA certificates of authorities, which signed intermediate CA certificates with weak private keys issued by the eMudhra certificate authority. A man-in-the-middle attacker could use this flaw to issue certificates for arbitrary host names signed by the weak intermediate CA certificates, which would be considered trusted by a TLS/SSL client using system CA store and cause such clients to connect to malicious sites. Due to inability to only distrust specific intermediate certificates in all clients using the system CA store, root CA certificates of authorities that signed weak intermediate CA certificates are being removed.

6.8 (Medium)


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

CWE-295 - Improper Certificate Validation

Affected products

Fixed 7 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms	—	Vendor Fix fix Workaround

Threats

Impact Critical

References

10 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:86595	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-114406	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-114406	self
https://bugzilla.redhat.com/show_bug.cgi?id=2556046	external
https://access.redhat.com/security/vulnerabilitie…	external
https://www.cve.org/CVERecord?id=CVE-2026-114406	external
https://nvd.nist.gov/vuln/detail/CVE-2026-114406	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-114406",
      "cwe": {
        "id": "CWE-295",
        "name": "Improper Certificate Validation"
      },
      "discovery_date": "2026-10-20T09:01:55.916000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2556046"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The system certificate authority (CA) store in Red Hat products, distributed via ca-certificates RPM packages, included multiple root CA certificates of authorities, which signed intermediate CA certificates with weak private keys issued by the eMudhra certificate authority. A man-in-the-middle attacker could use this flaw to issue certificates for arbitrary host names signed by the weak intermediate CA certificates, which would be considered trusted by a TLS/SSL client using system CA store and cause such clients to connect to malicious sites.\n\nDue to inability to only distrust specific intermediate certificates in all clients using the system CA store, root CA certificates of authorities that signed weak intermediate CA certificates are being removed.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "ca-certificates: Distrust eMudhra intermediate CA certificates due to security concerns",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
          "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
          "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms",
          "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@src",
          "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
          "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
          "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-114406"
        },
        {
          "category": "external",
          "summary": "RHBZ#2556046",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2556046"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-012",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-012"
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        {
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-114406",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-114406"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-114406",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114406"
        }
      ],
      "release_date": "2026-10-20T13:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-10-21T03:06:15+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:86595"
        },
        {
          "category": "workaround",
          "details": "See the security bulletin for a detailed mitigation procedure.",
          "product_ids": [
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms",
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@src",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms",
            "Red Hat Hardened Images:ca-certificates-0:2026.2.92_v9.0.319-1.hum1@src",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:ca-certificates-bundle-0:2026.2.92_v9.0.319-1.hum1@noarch@public-hummingbird-x86_64-rpms"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ],
      "title": "ca-certificates: Distrust eMudhra intermediate CA certificates due to security concerns"
    }
  ]
}

CVE-2026-114406 (GCVE-0-2026-114406)

Vulnerability from cvelistv5 – Published: 2026-10-21 20:56 – Updated: 2026-10-23 00:42

Title

Ca-certificates: distrust emudhra intermediate ca certificates due to security concerns

Summary

Severity

6.8 (Medium)


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

CWE

CWE-295 - Improper Certificate Validation

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1042 records in the last 180 days details

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:86595	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:88455	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:88459	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-114406	vdb-entryx_refsource_REDHAT
https://access.redhat.com/security/vulnerabilitie…	technical-descriptionx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2556046	issue-trackingx_refsource_REDHAT

Impacted products

9 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:2026.2.92_v9.0.319-100.3.el10_2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:2026.2.92_v9.0.319-90.3.el9_8 , < * (rpm) cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat	Red Hat Hardened Images	Unaffected: 2026.2.92_v9.0.319-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Advanced Cluster Security 4	cpe:/a:redhat:advanced_cluster_security:4
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat Satellite 6	cpe:/a:redhat:satellite:6

Date Public

2026-10-20 13:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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