{"id":"CVE-2026-45727","aliases":["GHSA-mf33-gv72-w2h5","PYSEC-2026-2420"],"url":"https://o3.security/vulnerability/CVE-2026-45727","summary":"CloakBrowser: Unauthenticated path traversal via fingerprint parameter in cloakserve leads to arbitrary directory deletion","details":"The `cloakserve` CDP multiplexer uses the user-supplied `fingerprint` query parameter directly as a filesystem path component when creating Chrome profile directories. An unauthenticated attacker who can reach the cloakserve port can supply a crafted `fingerprint` value containing path traversal sequences to resolve `user_data_dir` outside the configured `data_dir`. When Chrome fails to start or the process is cleaned up, `shutil.rmtree()` deletes the traversed path, resulting in arbitrary directory deletion.\n\nAdditionally, `cloakserve` bound to `0.0.0.0` by default, making it network-exposed.\n\n### Impact\n\nAn attacker with network access to the cloakserve port can delete arbitrary directories accessible to the service user.\n\n### Patches\n\nFixed in v0.3.28.\n\n### Mitigations\n\n- Upgrade to v0.3.28 or later\n- Restrict network access to the cloakserve port","published":"2026-06-01T17:23:50.130Z","modified":"2026-08-12T03:51:42.939917399Z","cvss":null,"epss":{"score":0.00475,"percentile":0.38938,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"cloakbrowser","fixedVersion":"0.3.28"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45727.json"},{"type":"ADVISORY","url":"https://github.com/CloakHQ/CloakBrowser/security/advisories/GHSA-mf33-gv72-w2h5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45727"},{"type":"PACKAGE","url":"https://github.com/CloakHQ/CloakBrowser"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.939917399Z"}}