Path Traversal in Thumbor
CVE-2026-53502
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.004 (29.0th percentile) — read the EPSS interpretation.
Affected products
- Thumbor — versions < 7.8.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)