CVE-2026-53502 — Thumbor has path traversal via post-validation URL decoding bypass in file_loader
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 tr…
Published: 2026-07-31 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7