Arbitrary host launch via unvalidated origin
Published Apr 2, 2026 · Updated Apr 2, 2026
Origin spoofing in Szafir SDK Web before 0.0.17.4 allows remote attackers to launch SzafirHost with arbitrary arguments. The browser add-on accepts document_base_url without checking that it matches the calling page's origin, then presents that attacker-controlled URL as the launch context. Execution normally requires a victim to approve the prompt; a prior approval saved with “remember” removes that interaction and permits downloads from the attacker-controlled site.
Summary
What happened
Origin spoofing in Szafir SDK Web before 0.0.17.4 allows remote attackers to launch SzafirHost with arbitrary arguments. The browser add-on accepts document_base_url without checking that it matches the calling page's origin, then presents that attacker-controlled URL as the launch context. Execution normally requires a victim to approve the prompt; a prior approval saved with “remember” removes that interaction and permits downloads from the attacker-controlled site.
The record
- CVE
- CVE-2026-26927
- Published
- Apr 2, 2026
- Updated
- Apr 2, 2026
- Vendor
- Krajowa Izba Rozliczeniowa S.A.
- Product
- Szafir SDK Web
- Classifications
- CWE-348, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 2, 2026CVE publishedPublication date reported by the CVE source.
- Apr 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <0.0.17.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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