high8.7
CVE-2026-53502
Thumbor has path traversal via post-validation URL decoding bypass in file_loader
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | thumbor | <= 7.7.7 | 7.8.0 |