RHSA-2026:51341

Vulnerability from csaf_redhat - Published: 2026-08-06 20:11 - Updated: 2026-08-22 14:52
Summary
Red Hat Security Advisory: Technical preview of the satellite/iop-vmaas-rhel9 container image
Severity
Important
Notes
Topic: A new satellite/iop-vmaas-rhel9 container image is now available as a technical preview in the Red Hat container registry.
Details: Red Hat Lightspeed in Satellite analyzes system health and configuration by applying predefined rules to a small set of local data, such as installed packages, running services, and configuration settings.
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-2026-25681

A flaw was found in golang.org/x/net/html. A remote attacker could exploit this vulnerability by providing specially crafted HTML. When this arbitrary HTML is parsed and rendered, it can result in an unexpected HTML tree, bypassing input sanitization. This can be leveraged to execute Cross-Site Scripting (XSS) attacks, potentially leading to arbitrary code execution in applications that use the affected component.

8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-27136

A flaw was found in golang.org/x/net/html. When arbitrary HTML is parsed and then rendered, it can result in an unexpected HTML tree. This allows an attacker to bypass HTML sanitization mechanisms, leading to Cross-Site Scripting (XSS) attacks in applications. Such attacks can result in information disclosure or arbitrary code execution.

8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-33811

A flaw was found in the `net` package of Go (golang), specifically when using the `LookupCNAME` function with the `cgo` DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name (CNAME) response. This can trigger a double-free of C memory, leading to a crash and a Denial of Service (DoS) for the affected application.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1341 - Multiple Releases of Same Resource or Handle
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-39821

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.

8.2 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-42502

A flaw was found in golang.org/x/net/html. This vulnerability allows an attacker to manipulate how HTML is processed and displayed. By providing specially crafted HTML, an attacker can cause an unexpected structure in the rendered output. This can lead to Cross-Site Scripting (XSS) attacks, where malicious scripts are executed in a user's web browser, potentially compromising user data or taking control of their session.

6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
References
URL Category
https://access.redhat.com/errata/RHSA-2026:51341 self
https://access.redhat.com/documentation/en-us/red… external
https://access.redhat.com/security/cve/CVE-2026-25681 external
https://access.redhat.com/security/cve/CVE-2026-27136 external
https://access.redhat.com/security/cve/CVE-2026-33811 external
https://access.redhat.com/security/cve/CVE-2026-39821 external
https://access.redhat.com/security/cve/CVE-2026-42502 external
https://access.redhat.com/security/updates/classi… external
https://catalog.redhat.com/software/containers/search external
https://docs.redhat.com/en/documentation/red_hat_… external
https://docs.redhat.com/en/documentation/red_hat_… external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-25681 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480761 external
https://www.cve.org/CVERecord?id=CVE-2026-25681 external
https://nvd.nist.gov/vuln/detail/CVE-2026-25681 external
https://go.dev/cl/781703 external
https://go.dev/issue/79574 external
https://groups.google.com/g/golang-announce/c/iI-… external
https://pkg.go.dev/vuln/GO-2026-5029 external
https://access.redhat.com/security/cve/CVE-2026-27136 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480757 external
https://www.cve.org/CVERecord?id=CVE-2026-27136 external
https://nvd.nist.gov/vuln/detail/CVE-2026-27136 external
https://go.dev/cl/781685 external
https://go.dev/issue/79575 external
https://pkg.go.dev/vuln/GO-2026-5030 external
https://access.redhat.com/security/cve/CVE-2026-33811 self
https://bugzilla.redhat.com/show_bug.cgi?id=2467822 external
https://www.cve.org/CVERecord?id=CVE-2026-33811 external
https://nvd.nist.gov/vuln/detail/CVE-2026-33811 external
https://go.dev/cl/767860 external
https://go.dev/issue/78803 external
https://groups.google.com/g/golang-announce/c/qcC… external
https://pkg.go.dev/vuln/GO-2026-4981 external
https://access.redhat.com/security/cve/CVE-2026-39821 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480756 external
https://www.cve.org/CVERecord?id=CVE-2026-39821 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39821 external
https://go.dev/cl/767220 external
https://go.dev/issue/78760 external
https://pkg.go.dev/vuln/GO-2026-5026 external
https://access.redhat.com/security/cve/CVE-2026-42502 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480762 external
https://www.cve.org/CVERecord?id=CVE-2026-42502 external
https://nvd.nist.gov/vuln/detail/CVE-2026-42502 external
https://go.dev/cl/781701 external
https://go.dev/issue/79572 external
https://pkg.go.dev/vuln/GO-2026-5027 external
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "A new satellite/iop-vmaas-rhel9 container image is now available as a technical preview in the Red Hat container registry.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat Lightspeed in Satellite analyzes system health and configuration by applying  predefined rules to a small set of local data, such as installed packages,  running services, and configuration settings.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "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.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:51341",
        "url": "https://access.redhat.com/errata/RHSA-2026:51341"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/documentation/en-us/red_hat_satellite/6.18/html/updating_red_hat_satellite/index",
        "url": "https://access.redhat.com/documentation/en-us/red_hat_satellite/6.18/html/updating_red_hat_satellite/index"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-25681",
        "url": "https://access.redhat.com/security/cve/CVE-2026-25681"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-27136",
        "url": "https://access.redhat.com/security/cve/CVE-2026-27136"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-33811",
        "url": "https://access.redhat.com/security/cve/CVE-2026-33811"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-39821",
        "url": "https://access.redhat.com/security/cve/CVE-2026-39821"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-42502",
        "url": "https://access.redhat.com/security/cve/CVE-2026-42502"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/",
        "url": "https://access.redhat.com/security/updates/classification/"
      },
      {
        "category": "external",
        "summary": "https://catalog.redhat.com/software/containers/search",
        "url": "https://catalog.redhat.com/software/containers/search"
      },
      {
        "category": "external",
        "summary": "https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html/installing_satellite_server_in_a_connected_network_environment/performing-additional-configuration-on-server_satellite#installing-and-configuring-red-hat-lightspeed-in-satellite",
        "url": "https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html/installing_satellite_server_in_a_connected_network_environment/performing-additional-configuration-on-server_satellite#installing-and-configuring-red-hat-lightspeed-in-satellite"
      },
      {
        "category": "external",
        "summary": "https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html/installing_satellite_server_in_a_disconnected_network_environment/performing-additional-configuration#installing-and-configuring-red-hat-lightspeed-in-satellite",
        "url": "https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html/installing_satellite_server_in_a_disconnected_network_environment/performing-additional-configuration#installing-and-configuring-red-hat-lightspeed-in-satellite"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_51341.json"
      }
    ],
    "title": "Red Hat Security Advisory: Technical preview of the satellite/iop-vmaas-rhel9 container image",
    "tracking": {
      "current_release_date": "2026-08-22T14:52:48+00:00",
      "generator": {
        "date": "2026-08-22T14:52:48+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.3.16"
        }
      },
      "id": "RHSA-2026:51341",
      "initial_release_date": "2026-08-06T20:11:21+00:00",
      "revision_history": [
        {
          "date": "2026-08-06T20:11:21+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-08-15T05:55:47+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-08-22T14:52:48+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Satellite 6.18",
                "product": {
                  "name": "Red Hat Satellite 6.18",
                  "product_id": "Red Hat Satellite 6.18",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:satellite:6.18::el9"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Satellite"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64",
                "product": {
                  "name": "registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64",
                  "product_id": "registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64",
                  "product_identification_helper": {
                    "purl": "pkg:oci/iop-vmaas-rhel9@sha256%3A1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9?arch=amd64\u0026repository_url=registry.redhat.io/satellite/iop-vmaas-rhel9\u0026tag=1785923308"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "amd64"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64 as a component of Red Hat Satellite 6.18",
          "product_id": "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
        },
        "product_reference": "registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64",
        "relates_to_product_reference": "Red Hat Satellite 6.18"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-25681",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "discovery_date": "2026-05-22T16:01:08.177603+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480761"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/net/html. A remote attacker could exploit this vulnerability by providing specially crafted HTML. When this arbitrary HTML is parsed and rendered, it can result in an unexpected HTML tree, bypassing input sanitization. This can be leveraged to execute Cross-Site Scripting (XSS) attacks, potentially leading to arbitrary code execution in applications that use the affected component.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/net/html: golang.org/x/net/html: Arbitrary code execution via Cross-Site Scripting",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Important vulnerability in `golang.org/x/net/html` could enable remote attackers to execute Cross-Site Scripting (XSS) attacks, potentially leading to arbitrary code execution. The flaw allows specially crafted HTML to bypass input sanitization during parsing and rendering. Red Hat products are affected if they process untrusted HTML content using the vulnerable component without additional output encoding or robust content security policies.",
          "title": "Statement"
        },
        {
          "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 Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-25681"
        },
        {
          "category": "external",
          "summary": "RHBZ#2480761",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480761"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-25681",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-25681"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-25681",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25681"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/781703",
          "url": "https://go.dev/cl/781703"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/79574",
          "url": "https://go.dev/issue/79574"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8",
          "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5029",
          "url": "https://pkg.go.dev/vuln/GO-2026-5029"
        }
      ],
      "release_date": "2026-05-22T15:01:21.975000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-06T20:11:21+00:00",
          "details": "For Red Hat Lightspeed in Satellite installation see the Red Hat Satellite documentation.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:51341"
        },
        {
          "category": "workaround",
          "details": "To mitigate this flaw, applications processing untrusted HTML input must implement strict input sanitization and ensure all output is properly encoded before rendering. Deploying a comprehensive Content Security Policy (CSP) can restrict script execution, further reducing the attack surface. Administrators should review application configurations to ensure adequate protection against XSS.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/net/html: golang.org/x/net/html: Arbitrary code execution via Cross-Site Scripting"
    },
    {
      "cve": "CVE-2026-27136",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "discovery_date": "2026-05-22T16:00:56.609820+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480757"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/net/html. When arbitrary HTML is parsed and then rendered, it can result in an unexpected HTML tree. This allows an attacker to bypass HTML sanitization mechanisms, leading to Cross-Site Scripting (XSS) attacks in applications. Such attacks can result in information disclosure or arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via HTML parsing bypass",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability in `golang.org/x/net/html` is rated as Important. It allows for Cross-Site Scripting (XSS) attacks by enabling an attacker to bypass HTML sanitization mechanisms when arbitrary HTML is parsed and rendered. This can lead to information disclosure or arbitrary code execution in affected applications. Exploitation typically requires user interaction, where a user processes specially crafted malicious HTML content.",
          "title": "Statement"
        },
        {
          "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 Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-27136"
        },
        {
          "category": "external",
          "summary": "RHBZ#2480757",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480757"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-27136",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-27136"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-27136",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27136"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/781685",
          "url": "https://go.dev/cl/781685"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/79575",
          "url": "https://go.dev/issue/79575"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8",
          "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5030",
          "url": "https://pkg.go.dev/vuln/GO-2026-5030"
        }
      ],
      "release_date": "2026-05-22T15:01:22.111000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-06T20:11:21+00:00",
          "details": "For Red Hat Lightspeed in Satellite installation see the Red Hat Satellite documentation.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:51341"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via HTML parsing bypass"
    },
    {
      "cve": "CVE-2026-33811",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
      },
      "discovery_date": "2026-05-07T20:01:34.913869+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2467822"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `net` package of Go (golang), specifically when using the `LookupCNAME` function with the `cgo` DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name (CNAME) response. This can trigger a double-free of C memory, leading to a crash and a Denial of Service (DoS) for the affected application.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the Go `net` package, affecting applications configured to use the `cgo` DNS resolver. A remote attacker could trigger a double-free memory error by providing a very long CNAME response, leading to a crash of the vulnerable application and impacting service availability.",
          "title": "Statement"
        },
        {
          "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 Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-33811"
        },
        {
          "category": "external",
          "summary": "RHBZ#2467822",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467822"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33811",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33811"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/767860",
          "url": "https://go.dev/cl/767860"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78803",
          "url": "https://go.dev/issue/78803"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M",
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4981",
          "url": "https://pkg.go.dev/vuln/GO-2026-4981"
        }
      ],
      "release_date": "2026-05-07T19:41:19.285000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-06T20:11:21+00:00",
          "details": "For Red Hat Lightspeed in Satellite installation see the Red Hat Satellite documentation.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:51341"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, applications can be configured to use the pure Go DNS resolver instead of the `cgo` DNS resolver. This can be achieved by setting the `GODEBUG` environment variable to `netdns=go`. For example, to run a Go application with this mitigation: `GODEBUG=netdns=go /path/to/your/go/application`. This change may require restarting affected applications or services to take effect. Users should verify that this change does not negatively impact DNS resolution for their specific application environment.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME"
    },
    {
      "cve": "CVE-2026-39821",
      "cwe": {
        "id": "CWE-1289",
        "name": "Improper Validation of Unsafe Equivalence in Input"
      },
      "discovery_date": "2026-05-22T16:00:52.844126+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480756"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "golang.org/x/net/idna is vulnerable to privilege escalation through incorrect Punycode label handling in ToASCII and ToUnicode. An attacker who can supply a Punycode hostname that passes an ASCII-only authorization check may have it normalized to a restricted ASCII name the application intended to block. Red Hat exposure is broad across products shipping the Go toolchain or bundling golang.org/x/net, including RHEL and RHEL-AI golang RPMs, hummingbird Go runtimes, OpenShift and ODF container builds, and Ceph/OpenShift components compiled against affected x/net versions.",
          "title": "Statement"
        },
        {
          "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 Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-39821"
        },
        {
          "category": "external",
          "summary": "RHBZ#2480756",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480756"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-39821",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-39821"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/767220",
          "url": "https://go.dev/cl/767220"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78760",
          "url": "https://go.dev/issue/78760"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8",
          "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5026",
          "url": "https://pkg.go.dev/vuln/GO-2026-5026"
        }
      ],
      "release_date": "2026-05-22T15:01:21.462000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-06T20:11:21+00:00",
          "details": "For Red Hat Lightspeed in Satellite installation see the Red Hat Satellite documentation.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:51341"
        },
        {
          "category": "workaround",
          "details": "Upgrade to a fixed golang.org/x/net release that includes the idna correction, via updated golang or dependent package rebuilds.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing"
    },
    {
      "cve": "CVE-2026-42502",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "discovery_date": "2026-05-22T16:01:11.151484+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480762"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/net/html. This vulnerability allows an attacker to manipulate how HTML is processed and displayed. By providing specially crafted HTML, an attacker can cause an unexpected structure in the rendered output. This can lead to Cross-Site Scripting (XSS) attacks, where malicious scripts are executed in a user\u0027s web browser, potentially compromising user data or taking control of their session.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via unexpected HTML tree rendering",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A flaw in golang.org/x/net/html can lead to Cross-Site Scripting (XSS) in applications that parse and render untrusted HTML, even with sanitization attempts. This is due to an unexpected HTML tree structure, allowing malicious scripts to execute in a user\u0027s browser.",
          "title": "Statement"
        },
        {
          "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 Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-42502"
        },
        {
          "category": "external",
          "summary": "RHBZ#2480762",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480762"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-42502",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-42502"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-42502",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42502"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/781701",
          "url": "https://go.dev/cl/781701"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/79572",
          "url": "https://go.dev/issue/79572"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8",
          "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5027",
          "url": "https://pkg.go.dev/vuln/GO-2026-5027"
        }
      ],
      "release_date": "2026-05-22T15:01:21.649000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-06T20:11:21+00:00",
          "details": "For Red Hat Lightspeed in Satellite installation see the Red Hat Satellite documentation.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:51341"
        },
        {
          "category": "workaround",
          "details": "Applications utilizing `golang.org/x/net/html` should implement robust sanitization of all untrusted HTML input before rendering to prevent the creation of unexpected HTML structures that could facilitate XSS attacks. If an application does not require rendering arbitrary HTML, it should avoid processing such input.",
          "product_ids": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Satellite 6.18:registry.redhat.io/satellite/iop-vmaas-rhel9@sha256:1fdcc43ad509f20876adc6e985a1246950649ee3c3cd1dbd48cef577e0c650a9_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via unexpected HTML tree rendering"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.