CVE-2026-82651
published 2026-08-30CVE-2026-82651: 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…
PriorityP430medium4.9CVSS 3.1
AVNACLPRHUINSUCHINAN
EPSS
0.48%
38.6th percentile
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/.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| siyuan-note | siyuan | < 3.8.1 | 3.8.1 |
CVSS provenance
nvdv3.14.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/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
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VulDB
siyuan-note SiYuan up to 3.8.0 IsForbiddenAbsPath kernel/server/serve.go information disclosure
vuldb·2026-08-30·CVSS 4.9
CVE-2026-82651 [MEDIUM] siyuan-note SiYuan up to 3.8.0 IsForbiddenAbsPath kernel/server/serve.go information disclosure
A vulnerability has been found in siyuan-note SiYuan up to 3.8.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file kernel/server/serve.go of the component IsForbiddenAbsPath. Performing a manipulation results in information disclosure.
This vulnerability is known as CVE-2026-82651. Remote exploitation of the attack is possible. No exploit is available.
The affected component should be upgraded.
GHSA
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.
ghsa_unreviewed·2026-08-30
CVE-2026-82651 [MEDIUM] CWE-200 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.
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/.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-30
Published