CVE-2026-53502
High
Description
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, file_loader decodes percent-encoded path segments after its root-boundary validation, allowing traversal outside FILE_LOADER_ROOT_PATH through watermark or frame filter input. This issue is fixed in 7.8.0.
SeverityHigh
CVSS8.7
Exploit probability—
ProductThumbor
PublishedJul 31, 2026
First seenJul 31, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- thumbor7.8.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| thumborPyPI | v < 7.8.0 | 7.8.0 |
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