Description
siyuan versions before v3.7.4 expose the session cookie signing key through the /api/system/getConf endpoint to unauthenticated users in publish mode. Attackers can retrieve the CookieKey value and forge valid session cookies to impersonate users or gain administrative access.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| siyuan-note | siyuan | < 3.7.4 | 3.7.4 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 | SUSE-SU-2026:23863-1, SUSE-SU-2026:23855-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 | SUSE-SU-2026:23863-1, SUSE-SU-2026:23855-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 | openSUSE-SU-2026:21897-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/siyuan-note/siyuan/kernel | < 0.0.0-20260725123945-77421530be4a | 0.0.0-20260725123945-77421530be4a | GHSA-34fj-mwm6-fjfg |
Advisories 3
- SUSE-SU-2026:23863-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 27, 2026
- SUSE-SU-2026:23855-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 27, 2026
- openSUSE-SU-2026:21897-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 25, 2026
References
- GitHub Security Advisory (GHSA-34fj-mwm6-fjfg) vendor-advisory
- VulnCheck Advisory: siyuan before v3.7.4 Session Cookie Key Disclosure via getConf third-party-advisory