01 Record
CVE-2026-8152
Unblu Spark Open Redirect leading to DOM-Based XSS
CriticalPUBLISHEDCNA: NCSC.ch
CNA base score9.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
02 Description
Unblu Spark Open Redirect leading to DOM-Based XSS
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.41% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 35.3% of scored records. A rank, not a probability.
- NVD base score
- 9.3 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- 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
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-24.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-07-22 12:21Z3 MO AGO
- Last updated
- 2026-07-22 18:55Z3 MO AGO
- Reserved
- 2026-05-08
- Assigning CNA
- NCSC.ch
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.3)
- CNA CVSS vector
- 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
- Weaknesses
- Data version
- 5.2
- Document digest
- cccc3cfb1e232949382e506e550d4b0043c7ebc7b5b17d33456c1a96ee12e48b
05 Affected products
VendorProductVersionsPlatforms
06 References
- docs.unblu.comUnblu Security Advisorieshttps://docs.unblu.com/latest/security-bulletins/#UBL-2026-001
07 Remediation
In the fix versions listed above, Unblu Spark validates all user-supplied redirects through the same redirect filter. After upgrading, please review your redirect filter configuration. The defaults restrict redirects to the current origin (document.location.origin).