{"cve":"CVE-2026-53502","nvd":{"published":"2026-07-31T19:17:09.577","modified":"2026-09-08T20:51:43.490","status":"Deferred","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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":null,"cwes":["CWE-22"],"references":["https://github.com/thumbor/thumbor/commit/3b986d13677b30fe6651c8c72ebb25957ac0a40d","https://github.com/thumbor/thumbor/releases/tag/7.8.0","https://github.com/thumbor/thumbor/security/advisories/GHSA-cj54-hpcc-gj6h","https://github.com/thumbor/thumbor/security/advisories/GHSA-cj54-hpcc-gj6h"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-53502","score":0.00522,"percentile":0.44355,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-cj54-hpcc-gj6h","url":"https://osv.dev/vulnerability/GHSA-cj54-hpcc-gj6h","summary":"Thumbor has path traversal via post-validation URL decoding bypass in file_loader","modified":"2026-08-04T14:40:39.499145349Z","packages":[{"ecosystem":"PyPI","name":"thumbor","purl":"pkg:pypi/thumbor","ranges":["<7.8.0"],"fixed":["7.8.0"]}]},{"id":"PYSEC-2026-3618","url":"https://osv.dev/vulnerability/PYSEC-2026-3618","summary":"Thumbor has path traversal via post-validation URL decoding bypass in file_loader","modified":"2026-08-04T14:30:17.840498063Z","packages":[{"ecosystem":"PyPI","name":"thumbor","purl":"pkg:pypi/thumbor","ranges":["<7.8.0"],"fixed":["7.8.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}