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      <title>CVE-2026-82651 — SiYuan before v3.8.1 Missing Authorization via /history and /repo/diff</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-82651</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; siyuan-note siyuan&lt;/p&gt;
&lt;p&gt;SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard (introduced in GHSA-c8r8-95hg-mp34) to the /history/*path and /repo/diff/*path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can retrieve historical snapshots of sensitive files that the guard is meant to block, including data/.siyuan/publishAccess.json (plaintext publish-mode passwords) and files under data/templates/.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; siyuan-note siyuan&lt;/p&gt;
&lt;p&gt;SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard (introduced in GHSA-c8r8-95hg-mp34) to the /history/*path and /repo/diff/*path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can retrieve historical snapshots of sensitive files that the guard is meant to block, including data/.siyuan/publishAccess.json (plaintext publish-mode passwords) and files under data/templates/.&lt;/p&gt;</content:encoded>
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