Vulnerability-Lookup

CVE-2026-8152 (GCVE-0-2026-8152)

Vulnerability from cvelistv5 – Published: 2026-07-22 12:21 – Updated: 2026-07-22 18:55

Title

Unblu Spark Open Redirect leading to DOM-Based XSS

Summary

Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack. When Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application's cookies, DOM, and same-origin APIs — an attacker can reach all resources of the host application, not just Unblu's. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.

Severity

9.3 (Critical)


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

7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

NCSC.ch

References

1 reference

URL	Tags
https://docs.unblu.com/latest/security-bulletins/…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Unblu inc.	Unblu Spark	Affected: 0 , ≤ 8.36.1 (semver) Unaffected: 8.36.1-hotfix.0 (semver) Unaffected: 8.37.0 (semver)

Credits

Kenan Karalioglu (chef_shell) via YesWeHack

Show details on NVD website

JSON

To clipboard

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The CSP blocks the injected JavaScript from executing and prevents the exploit from succeeding. \u003cb\u003eNote:\u003c/b\u003e\u0026nbsp;this protection is only effective on Unblu Spark \u003cb\u003e7.56.2 or later\u003c/b\u003e\u0026nbsp;in the 7.x series and \u003cb\u003e8.19.1 or later\u003c/b\u003e\u0026nbsp;in the 8.x series, where\u0026nbsp;\u003ccode\u003eunsafe-inline\u003c/code\u003e\u0026nbsp;was removed from the script source policy. Earlier versions ship a CSP that still permits\u0026nbsp;\u003ccode\u003eunsafe-inline\u003c/code\u003e\u0026nbsp;and are not protected by this workaround.\u003c/li\u003e\u003cli\u003eConfigure a WAF rule to block requests that carry a malicious payload in the\u0026nbsp;\u003ccode\u003eredirectOnFailure\u003c/code\u003e\u0026nbsp;parameter (in particular, values containing a\u0026nbsp;\u003ccode\u003ejavascript:\u003c/code\u003e\u0026nbsp;scheme or obfuscated variants such as\u0026nbsp;\u003ccode\u003ejava%0ascript:\u003c/code\u003e).\u003c/li\u003e\u003c/ul\u003e\u003c/div\u003e\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"manual\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack.\\n\\n\\nWhen Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application\u0027s cookies, DOM, and same-origin APIs \\u2014 an attacker can reach all resources of the host application, not just Unblu\u0027s. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cdiv\u003e\u003cdiv\u003eUnblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack.\u003c/div\u003e\u003cbr\u003e\u003cdiv\u003eWhen Unblu Spark is deployed with \u003ccode\u003ecom.unblu.identifier.siteEmbeddedSetup=true\u003c/code\u003e, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application\u0027s cookies, DOM, and same-origin APIs \\u2014 an attacker can reach all resources of the host application, not just Unblu\u0027s. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.\u003c/div\u003e\u003c/div\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-601\", \"description\": \"CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"455daabc-a392-441d-aa46-37d35189897c\", \"shortName\": \"NCSC.ch\", \"dateUpdated\": \"2026-07-22T12:21:28.977Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-8152\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-22T18:55:07.732Z\", \"dateReserved\": \"2026-05-08T08:12:13.325Z\", \"assignerOrgId\": \"455daabc-a392-441d-aa46-37d35189897c\", \"datePublished\": \"2026-07-22T12:21:28.977Z\", \"assignerShortName\": \"NCSC.ch\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-8152

Vulnerability from fkie_nvd - Published: 2026-07-22 13:16 - Updated: 2026-07-22 19:17

Severity

9.3 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Summary

References

	URL	Tags
	vulnerability@ncsc.ch	https://docs.unblu.com/latest/security-bulletins/#UBL-2026-001

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "affected",
          "platforms": [
            "On-premises",
            "Cloud"
          ],
          "product": "Unblu Spark",
          "vendor": "Unblu inc.",
          "versions": [
            {
              "lessThanOrEqual": "8.36.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "8.36.1-hotfix.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "8.37.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "vulnerability@ncsc.ch"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack.\n\n\nWhen Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application\u0027s cookies, DOM, and same-origin APIs \u2014 an attacker can reach all resources of the host application, not just Unblu\u0027s. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL."
    }
  ],
  "id": "CVE-2026-8152",
  "lastModified": "2026-07-22T19:17:14.617",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "vulnerability@ncsc.ch",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-8152",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-22T18:54:56.321413Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-22T13:16:38.423",
  "references": [
    {
      "source": "vulnerability@ncsc.ch",
      "url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-001"
    }
  ],
  "sourceIdentifier": "vulnerability@ncsc.ch",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "vulnerability@ncsc.ch",
      "type": "Secondary"
    }
  ]
}

GHSA-6F3H-GQRM-69GC

Vulnerability from github – Published: 2026-07-22 15:31 – Updated: 2026-07-22 15:31

Details

Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack.

When Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application's cookies, DOM, and same-origin APIs — an attacker can reach all resources of the host application, not just Unblu's. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.

Severity

9.3 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8152"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-22T13:16:38Z",
    "severity": "CRITICAL"
  },
  "details": "Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack.\n\n\nWhen Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application\u0027s cookies, DOM, and same-origin APIs \u2014 an attacker can reach all resources of the host application, not just Unblu\u0027s. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.",
  "id": "GHSA-6f3h-gqrm-69gc",
  "modified": "2026-07-22T15:31:21Z",
  "published": "2026-07-22T15:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8152"
    },
    {
      "type": "WEB",
      "url": "https://docs.unblu.com/latest/security-bulletins/#UBL-2026-001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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

CVE-2026-8152 (GCVE-0-2026-8152)

FKIE_CVE-2026-8152

GHSA-6F3H-GQRM-69GC

Tags

Sightings

Nomenclature