{"id":"CVE-2026-51859","title":"bisheng 2.3.0, 2.4.0, and 2.4.0-beta1 is vulnerable to directory traversal in save_download_file (src/backend/bisheng/core/cache/utils.py:290).","summary":"bisheng 2.3.0, 2.4.0, and 2.4.0-beta1 is vulnerable to directory traversal in save_download_file (src/backend/bisheng/core/cache/utils.py:290).","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-22"],"published":"2026-09-30","updated":"2026-10-01","sourceUpdated":"2026-10-01T19:17:20.790","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-51859","references":[{"url":"https://gist.github.com/Ro1ME/df160925a60dd917550f7c87bfe62519","label":"cve@mitre.org"},{"url":"https://github.com/dataelement/bisheng/issues/1994","label":"cve@mitre.org"},{"url":"https://github.com/dataelement/bisheng/issues/1994","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-01T18:47:35.734560Z"},"epss":0.00771,"epssPercentile":0.55457,"ingestedAt":"2026-09-30T21:25:07.843Z","slug":"CVE-2026-51859","body":"## Overview\n\nbisheng 2.3.0, 2.4.0, and 2.4.0-beta1 is vulnerable to directory traversal in save_download_file (src/backend/bisheng/core/cache/utils.py:290).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":62,"depthScoreParts":{"impact":50.1,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":214640,"id":"CVE-2026-51859","ts":1790884778947,"field":"exploit_available","old":"false","new":"true"},{"seq":214639,"id":"CVE-2026-51859","ts":1790884778947,"field":"cvss","old":null,"new":"9.1"},{"seq":214638,"id":"CVE-2026-51859","ts":1790884778947,"field":"severity","old":"none","new":"critical"}]}