Vulnerability-Lookup

RHSA-2026:43625

Vulnerability from csaf_redhat - Published: 2026-07-22 15:35 - Updated: 2026-07-26 14:47

Summary

Red Hat Security Advisory: OpenShift Virtualization v4.22 Images

Severity

Important

Notes

Topic: Red Hat OpenShift Virtualization release v4.22 is now available with updates to packages and images that fix several bugs and add enhancements.

Details: OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. This advisory contains OpenShift Virtualization v4.22 images.

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-2026-49978

A flaw was found in DOMPurify, a tool designed to sanitize HTML, MathML, and SVG to prevent cross-site scripting (XSS) attacks. When performing in-place sanitization, DOMPurify could fail to properly process content within shadow DOM elements attached to a <template>.content. This oversight allows an attacker to embed malicious code, such as JavaScript, which could then execute when the sanitized template is used by an application, potentially leading to unauthorized actions or information disclosure.

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

Fixed 3 products

Product	Version	Remediation
Unresolved product id: Red Hat Container Native Virtualization 4.22:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:ccca927ed5bc13a73798de941a82cd5f5248f3c7734451f40e0db4a6bfa8e609_amd64	—	Vendor Fix fix
Unresolved product id: Red Hat Container Native Virtualization 4.22:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:d5baeb7beab6cc11096bf75b71d42d1d356f0f2aff6d5eabc41715fd5a15088d_s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Container Native Virtualization 4.22:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:ffb2fba6539cb7454adbe3bd55a3120f2d8d6c74ce39a86da002ac95dc27f448_arm64	—	Vendor Fix fix

Threats

Impact Important

References

11 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:43625	self
https://access.redhat.com/security/cve/CVE-2026-49978	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-2026-49978	self
https://bugzilla.redhat.com/show_bug.cgi?id=2500695	external
https://www.cve.org/CVERecord?id=CVE-2026-49978	external
https://nvd.nist.gov/vuln/detail/CVE-2026-49978	external
https://github.com/cure53/DOMPurify/commit/ca30f0…	external
https://github.com/cure53/DOMPurify/releases/tag/3.4.7	external
https://github.com/cure53/DOMPurify/security/advi…	external

JSON

To clipboard

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    {
      "cve": "CVE-2026-49978",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
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      "ids": [
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          "text": "2500695"
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          "category": "description",
          "text": "A flaw was found in DOMPurify, a tool designed to sanitize HTML, MathML, and SVG to prevent cross-site scripting (XSS) attacks. When performing in-place sanitization, DOMPurify could fail to properly process content within shadow DOM elements attached to a \u003ctemplate\u003e.content. This oversight allows an attacker to embed malicious code, such as JavaScript, which could then execute when the sanitized template is used by an application, potentially leading to unauthorized actions or information disclosure.",
          "title": "Vulnerability description"
        },
        {
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          "text": "dompurify: DOMPurify: Cross-site scripting vulnerability allows code execution",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability in DOMPurify is rated as Important as it allows for cross-site scripting (XSS) attacks. When DOMPurify performs in-place sanitization, it may fail to properly process shadow DOM content within `\u003ctemplate\u003e.content`, enabling an attacker to embed and execute malicious JavaScript. This could lead to unauthorized actions or information disclosure in Red Hat products that utilize DOMPurify for sanitizing untrusted HTML, MathML, or SVG.",
          "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"
        }
      ],
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          "Red Hat Container Native Virtualization 4.22:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:ffb2fba6539cb7454adbe3bd55a3120f2d8d6c74ce39a86da002ac95dc27f448_arm64"
        ]
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-49978"
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500695"
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        {
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          "summary": "https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff",
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          "summary": "https://github.com/cure53/DOMPurify/releases/tag/3.4.7",
          "url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.7"
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          "restart_required": {
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      "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": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "dompurify: DOMPurify: Cross-site scripting vulnerability allows code execution"
    }
  ]
}

CVE-2026-49978 (GCVE-0-2026-49978)

Vulnerability from cvelistv5 – Published: 2026-07-14 20:02 – Updated: 2026-07-21 14:59

Title

DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content

Summary

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/cure53/DOMPurify/security/advi…	x_refsource_CONFIRM
https://github.com/cure53/DOMPurify/commit/ca30f0…	x_refsource_MISC
https://github.com/cure53/DOMPurify/releases/tag/3.4.7	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
cure53	DOMPurify	Affected: < 3.4.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-49978",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-21T14:59:10.987336Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-21T14:59:20.582Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "DOMPurify",
          "vendor": "cure53",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.4.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside \u003ctemplate\u003e.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T20:02:46.263Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq"
        },
        {
          "name": "https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff"
        },
        {
          "name": "https://github.com/cure53/DOMPurify/releases/tag/3.4.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.7"
        }
      ],
      "source": {
        "advisory": "GHSA-rp9w-3fw7-7cwq",
        "discovery": "UNKNOWN"
      },
      "title": "DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside \u003ctemplate\u003e.content"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-49978",
    "datePublished": "2026-07-14T20:02:46.263Z",
    "dateReserved": "2026-06-02T18:30:51.281Z",
    "dateUpdated": "2026-07-21T14:59:20.582Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

Action not permitted

RHSA-2026:43625

CVE-2026-49978 (GCVE-0-2026-49978)

Tags

Sightings

Nomenclature