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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"type": "text/html",
"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"
}
}
},
"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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
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.
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.