Vulnerability-Lookup

RHSA-2026:27872

Vulnerability from csaf_redhat - Published: 2026-06-22 12:31 - Updated: 2026-10-21 09:01

Summary

Red Hat Security Advisory: OpenShift Virtualization v4.19 Images

Severity

Moderate

Notes

Topic: Red Hat OpenShift Virtualization release v4.19 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 v4.19 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-2026-41240

A flaw was found in DOMPurify, a DOM-only cross-site scripting sanitizer. A remote attacker could exploit an inconsistency in how forbidden tags and attributes are handled when function-based tag additions are used. This allows malicious HTML, MathML, or SVG elements to bypass sanitization and execute arbitrary code in the user's browser, leading to Cross-Site Scripting (XSS).

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 4.19:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:3bdc9cfc75174cdf2b9f730190d6e81b0f3565d433b5c52715ce09a0b28a511e_arm64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.19:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:a75ba50711ab522399e6fada2e34ff034081df0cc998df7fd28dd723bc86973f_amd64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.19:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:ff98d0d85b7d763d2e614ccf66ce2b1e15207f845ff972d7804c66663a1913ce_s390x	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

11 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:27872	self
https://access.redhat.com/security/cve/CVE-2026-41240	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-2026-41240	self
https://bugzilla.redhat.com/show_bug.cgi?id=2461147	external
https://www.cve.org/CVERecord?id=CVE-2026-41240	external
https://nvd.nist.gov/vuln/detail/CVE-2026-41240	external
https://github.com/cure53/DOMPurify/commit/c361ba…	external
https://github.com/cure53/DOMPurify/releases/tag/3.4.0	external
https://github.com/cure53/DOMPurify/security/advi…	external

JSON

To clipboard

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        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
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          "text": "A flaw was found in DOMPurify, a DOM-only cross-site scripting sanitizer. A remote attacker could exploit an inconsistency in how forbidden tags and attributes are handled when function-based tag additions are used. This allows malicious HTML, MathML, or SVG elements to bypass sanitization and execute arbitrary code in the user\u0027s browser, leading to Cross-Site Scripting (XSS).",
          "title": "Vulnerability description"
        },
        {
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          "text": "DOMPurify: DOMPurify: Cross-Site Scripting (XSS) via inconsistent tag sanitization",
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        {
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          "summary": "https://github.com/cure53/DOMPurify/commit/c361baa18dbdcb3344a41110f4c48ad85bf48f80",
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      "remediations": [
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          "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.",
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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": [
            "Red Hat Container Native Virtualization 4.19:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:3bdc9cfc75174cdf2b9f730190d6e81b0f3565d433b5c52715ce09a0b28a511e_arm64",
            "Red Hat Container Native Virtualization 4.19:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:a75ba50711ab522399e6fada2e34ff034081df0cc998df7fd28dd723bc86973f_amd64",
            "Red Hat Container Native Virtualization 4.19:registry.redhat.io/container-native-virtualization/kubevirt-console-plugin-rhel9@sha256:ff98d0d85b7d763d2e614ccf66ce2b1e15207f845ff972d7804c66663a1913ce_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "DOMPurify: DOMPurify: Cross-Site Scripting (XSS) via inconsistent tag sanitization"
    }
  ]
}

CVE-2026-41240 (GCVE-0-2026-41240)

Vulnerability from cvelistv5 – Published: 2026-04-23 14:54 – Updated: 2026-04-23 17:21

Title

DOMPurify: FORBID_TAGS bypassed by function-based ADD_TAGS predicate (asymmetry with FORBID_ATTR fix)

Summary

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions prior to 3.4.0 have an inconsistency between FORBID_TAGS and FORBID_ATTR handling when function-based ADD_TAGS is used. Commit c361baa added an early exit for FORBID_ATTR at line 1214. The same fix was not applied to FORBID_TAGS. At line 1118-1123, when EXTRA_ELEMENT_HANDLING.tagCheck returns true, the short-circuit evaluation skips the FORBID_TAGS check entirely. This allows forbidden elements to survive sanitization with their attributes intact. Version 3.4.0 patches the issue.

Severity

6 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-23 17:21 UTC

CWE

CWE-183 - Permissive List of Allowed Inputs
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7838 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/cure53/DOMPurify/security/advi…	x_refsource_CONFIRM
https://github.com/cure53/DOMPurify/commit/c361ba…	x_refsource_MISC
https://github.com/cure53/DOMPurify/releases/tag/3.4.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
cure53	DOMPurify	Affected: < 3.4.0

Show details on NVD website

JSON

To clipboard

{
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                "id": "CVE-2026-41240",
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-23T17:21:26.630611Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-23T17:21:30.547Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-h7mw-gpvr-xq4m"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "DOMPurify",
          "vendor": "cure53",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.4.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions prior to 3.4.0 have an inconsistency between FORBID_TAGS and FORBID_ATTR handling when function-based ADD_TAGS is used. Commit c361baa added an early exit for FORBID_ATTR at line 1214. The same fix was not applied to FORBID_TAGS. At line 1118-1123, when EXTRA_ELEMENT_HANDLING.tagCheck returns true, the short-circuit evaluation skips the FORBID_TAGS check entirely. This allows forbidden elements to survive sanitization with their attributes intact. Version 3.4.0 patches the issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-183",
              "description": "CWE-183: Permissive List of Allowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "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": "2026-04-23T14:54:32.426Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-h7mw-gpvr-xq4m",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-h7mw-gpvr-xq4m"
        },
        {
          "name": "https://github.com/cure53/DOMPurify/commit/c361baa18dbdcb3344a41110f4c48ad85bf48f80",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cure53/DOMPurify/commit/c361baa18dbdcb3344a41110f4c48ad85bf48f80"
        },
        {
          "name": "https://github.com/cure53/DOMPurify/releases/tag/3.4.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.0"
        }
      ],
      "source": {
        "advisory": "GHSA-h7mw-gpvr-xq4m",
        "discovery": "UNKNOWN"
      },
      "title": "DOMPurify: FORBID_TAGS bypassed by function-based ADD_TAGS predicate (asymmetry with FORBID_ATTR fix)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-41240",
    "datePublished": "2026-04-23T14:54:32.426Z",
    "dateReserved": "2026-04-18T03:47:03.135Z",
    "dateUpdated": "2026-04-23T17:21:30.547Z",
    "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.

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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