{"id":"GHSA-ww86-c2qf-w8fw","summary":"Duplicate Advisory: Missing authorization on refreshBacklink allows anonymous readers to trigger persistent server-side writes and unauthenticated resource amplification (publish mode)","details":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-wgwx-479j-23vq. This link is maintained to preserve external references.\n\n## Original Description\nSiYuan versions before v3.7.4 contain a missing authorization vulnerability in the /api/ref/refreshBacklink endpoint that allows anonymous readers to trigger persistent server-side writes. Attackers can invoke the endpoint with an attacker-controlled block ID to flush transaction queues, scan all references globally, and enqueue database writes, bypassing read-only protections and enabling resource amplification attacks.","modified":"2026-09-03T22:30:08.605499672Z","published":"2026-08-14T12:31:24Z","withdrawn":"2026-09-03T22:22:57Z","database_specific":{"cwe_ids":["CWE-862"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-09-03T22:22:57Z","nvd_published_at":"2026-08-14T12:16:44Z"},"references":[{"type":"WEB","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wgwx-479j-23vq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72812"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/siyuan-before-missing-authorization-via-refreshbacklink"}],"affected":[{"package":{"name":"github.com/siyuan-note/siyuan/kernel","ecosystem":"Go","purl":"pkg:golang/github.com/siyuan-note/siyuan/kernel"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c 3.7.4","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-ww86-c2qf-w8fw/GHSA-ww86-c2qf-w8fw.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}