CVE-2026-53502CWE-22path-traversal

CVE-2026-53502

published July 31, 2026

CVSS

8.7

EPSS

Percentile

43.5

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS: 8.7 · NONE
CVSS v4.0: Not supplied
EPSS: 0.00522 · 43.5th percentile
Weakness: CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published: 2026-07-31T23:17Z

References (4)

https://github.com/thumbor/thumbor/commit/3b986d13677b30fe6651c8c72ebb25957ac0a40d · [email protected]https://github.com/thumbor/thumbor/releases/tag/7.8.0 · [email protected]https://github.com/thumbor/thumbor/security/advisories/GHSA-cj54-hpcc-gj6h · [email protected]https://github.com/thumbor/thumbor/security/advisories/GHSA-cj54-hpcc-gj6h · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

31 JUL 19:03Z
Thumbor has path traversal via post-validation URL decoding bypass in file_loader
cvelistv5