Stored XSS via unvalidated image data URI
Published Aug 31, 2026 · Updated Sep 1, 2026
Stored XSS in Backpack CRUD 6.0.0 through 6.8.13 and 7.0.0 through 7.0.37 allows remote authenticated users to run script via image fields. SingleBase64Image::uploadFiles and uploadRepeatableFiles accept any data:image prefix, decode the unchecked payload, and write it while FileNameGenerator derives no extension from the data URI. Script execution requires administrator access, an image field using withFiles(), permissive content serving, and a user who opens the stored file.
Summary
What happened
Stored XSS in Backpack CRUD 6.0.0 through 6.8.13 and 7.0.0 through 7.0.37 allows remote authenticated users to run script via image fields. SingleBase64Image::uploadFiles and uploadRepeatableFiles accept any data:image prefix, decode the unchecked payload, and write it while FileNameGenerator derives no extension from the data URI. Script execution requires administrator access, an image field using withFiles(), permissive content serving, and a user who opens the stored file.
The record
- CVE
- CVE-2026-54179
- Published
- Aug 31, 2026
- Updated
- Sep 1, 2026
- Vendor
- Backpack for Laravel
- Product
- Backpack CRUD
- Classifications
- CWE-79, CWE-434, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Aug 31, 2026CVE publishedPublication date reported by the CVE source.
- Sep 1, 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=>= 6.0.0, < 6.8.14
- Affected versionversion=>= 7.0.0, < 7.0.38
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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