{"id":"CVE-2026-71271","summary":"Memos Webhook SSRF via 0.0.0.0 Reserved-IP Bypass","details":"Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.","modified":"2026-08-12T03:51:48.698519634Z","published":"2026-08-05T12:26:18.502Z","database_specific":{"cna_assigner":"TuranSec","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71271.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71271.json"},{"type":"ADVISORY","url":"https://github.com/usememos/memos"},{"type":"ADVISORY","url":"https://github.com/usememos/memos/blob/main/internal/webhook/validate.go"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71271"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/usememos/memos","events":[{"introduced":"0"},{"last_affected":"5f194da7d3f71a428b437898cdfd073c66a3df38"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"0.29.1"}]}}],"versions":["v0.29.1","v0.29.0","v0.28.0","v0.27.1","v0.27.0","v0.27.0-rc.2","v0.27.0-rc.1","v0.26.2","v0.26.1","v0.26.0","v0.25.3","v0.25.2","v0.25.1","v0.25.0","v0.24.4","v0.24.3","v0.24.2","v0.24.1","v0.24.0","v0.23.1","v0.23.0","v0.23.0-rc.3","v0.23.0-rc.2","v0.23.0-rc.1","v0.23.0-rc.0","v0.22.5","v0.22.4","v0.22.3","v0.22.2","v0.22.1","v0.22.0","v0.21.0","v0.20.1","v0.20.0","v0.19.1","v0.19.0","v0.18.2","v0.18.1","v0.18.0","v0.17.1","v0.16.1","v0.16.0","v0.15.2","v0.15.1","v0.15.0","v0.14.4","v0.14.3","v0.14.2","v0.14.1","v0.14.0","v0.13.2","v0.13.1","v0.13.0","v0.12.2","v0.12.1","v0.12.0","v0.11.2","v0.11.1","v0.11.0","v0.10.3","v0.10.2","v0.9.1","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.1","v0.6.0","v0.5.0","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71271.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N"}]}