{"cve":"CVE-2026-34750","nvd":{"published":"2026-04-01T20:16:27.337","modified":"2026-10-25T23:10:00.167","status":"Analyzed","description":"Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3, the client-upload signed-URL endpoints for S3, GCS, Azure, and R2 did not properly sanitize filenames. An attacker could craft filenames to escape the intended storage location. This issue has been patched in version 3.78.0 for @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-22"],"references":["https://github.com/payloadcms/payload/security/advisories/GHSA-frq9-7j6g-v74x"],"products":["payloadcms:payload"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-34750","score":0.00341,"percentile":0.27394,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-frq9-7j6g-v74x","url":"https://osv.dev/vulnerability/GHSA-frq9-7j6g-v74x","summary":"Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints","modified":"2026-04-01T21:56:20.986235Z","packages":[{"ecosystem":"npm","name":"@payloadcms/storage-azure","purl":"pkg:npm/%40payloadcms/storage-azure","ranges":["<3.78.0"],"fixed":["3.78.0"]},{"ecosystem":"npm","name":"@payloadcms/storage-gcs","purl":"pkg:npm/%40payloadcms/storage-gcs","ranges":["<3.78.0"],"fixed":["3.78.0"]},{"ecosystem":"npm","name":"@payloadcms/storage-r2","purl":"pkg:npm/%40payloadcms/storage-r2","ranges":["<3.78.0"],"fixed":["3.78.0"]},{"ecosystem":"npm","name":"@payloadcms/storage-s3","purl":"pkg:npm/%40payloadcms/storage-s3","ranges":["<3.78.0"],"fixed":["3.78.0"]}]}],"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."]}