CVE-2026-8152 (GCVE-0-2026-8152)
Vulnerability from cvelistv5 – Published: 2026-07-22 12:21 – Updated: 2026-07-22 18:55
VLAI
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:54 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://docs.unblu.com/latest/security-bulletins/… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Unblu inc. | Unblu Spark |
Affected:
0 , ≤ 8.36.1
(semver)
Unaffected: 8.36.1-hotfix.0 (semver) Unaffected: 8.37.0 (semver) |
guessed |
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"value": "\u003cdiv\u003eIf you cannot upgrade immediately, either of the following measures prevents exploitation:\u003c/div\u003e\u003cdiv\u003e\u003cul\u003e\u003cli\u003eEnable the built-in Content Security Policy by setting\u0026nbsp;\u003ccode\u003ecom.unblu.contentsecuritypolicy.mode=on\u003c/code\u003e. 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"
}
],
"value": "If you cannot upgrade immediately, either of the following measures prevents exploitation:\n\n * Enable the built-in Content Security Policy by setting\u00a0com.unblu.contentsecuritypolicy.mode=on. The CSP blocks the injected JavaScript from executing and prevents the exploit from succeeding. Note:\u00a0this protection is only effective on Unblu Spark 7.56.2 or later\u00a0in the 7.x series and 8.19.1 or later\u00a0in the 8.x series, where\u00a0unsafe-inline\u00a0was removed from the script source policy. Earlier versions ship a CSP that still permits\u00a0unsafe-inline\u00a0and are not protected by this workaround.\n * Configure a WAF rule to block requests that carry a malicious payload in the\u00a0redirectOnFailure\u00a0parameter (in particular, values containing a\u00a0javascript:\u00a0scheme or obfuscated variants such as\u00a0java%0ascript:)."
}
],
"x_generator": {
"engine": "manual"
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}
},
"cveMetadata": {
"assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
"assignerShortName": "NCSC.ch",
"cveId": "CVE-2026-8152",
"datePublished": "2026-07-22T12:21:28.977Z",
"dateReserved": "2026-05-08T08:12:13.325Z",
"dateUpdated": "2026-07-22T18:55:07.732Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
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.
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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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