{"id":"CVE-2026-91750","title":"WeKnora before 0.7.0 fails to re-validate HTTP redirect targets in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint when downloading documents from user-supplied URLs","summary":"WeKnora before 0.7.0 fails to re-validate HTTP redirect targets in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint when downloading documents from user-supplied URLs. Authenticated attackers can bypass initial SSRF validation…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-918"],"vendor":"Tencent","product":"WeKnora","affected":["WeKnora >= 0.5.2 < 0.7.0"],"published":"2026-09-15","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:47.813","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91750","references":[{"url":"https://github.com/Tencent/WeKnora","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Tencent/WeKnora/blob/v0.6.2/internal/application/service/knowledge_util.go#L339-L348","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Tencent/WeKnora/commit/1d322c525a6197d24f07555b4b18ad33313b4328","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Tencent/WeKnora/issues/2511","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/weknora-before-0.7.0-ssrf-via-unvalidated-http-redirects","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Tencent/WeKnora/issues/2511","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00265,"epssPercentile":0.18657,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-16T16:54:08.362553Z"},"ingestedAt":"2026-09-15T01:18:29.936Z","slug":"CVE-2026-91750","body":"## Overview\n\nWeKnora before 0.7.0 fails to re-validate HTTP redirect targets in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint when downloading documents from user-supplied URLs. Authenticated attackers can bypass initial SSRF validation by supplying a public URL that redirects to internal network addresses, allowing access to internal services and cloud metadata.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":205556,"id":"CVE-2026-91750","ts":1789578046557,"field":"exploit_available","old":"false","new":"true"}]}