CVE-2026-74867

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH confidence

Score 4.2 from GitHub Security Advisory (severity: LOW) published 2026-08-17. a secondary CVSS source baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth() that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthorized actions on behalf of authenticated users by submitting requests with valid session cookies, relying on browser default SameSite policies rather than server-enforced protections.

CVSS v3
4.2
EG Score
4.2(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity42% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
Patch available. Sources: github.
generic

SiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-cross-site-request-forgery-via-checkauth
github Patch Available

Session-cookie authentication branch of `CheckAuth()` has no Origin/Referer validation and the session cookie sets no explicit `SameSite` attribute, leaving CSRF protection entirely dependent on undocumented browser defaults · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhm2-g993-p656

Vendor Advisories for CVE-2026-74867(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 15:18 UTCEG score recompute
  3. 2026-08-20 15:18 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 15:19 UTCGHSA enrichment
  6. 2026-08-18 15:18 UTCEG score recompute
  7. 2026-08-18 15:18 UTCGHSA enrichment
  8. 2026-08-18 14:51 UTCEG score recompute
  9. 2026-08-18 14:51 UTCGHSA enrichment
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 11:41 UTCEG score recompute
  13. 2026-08-18 11:41 UTCGHSA enrichment
  14. 2026-08-17 11:42 UTCEG score recompute
  15. 2026-08-17 11:13 UTCEG score recompute
  16. 2026-08-17 11:12 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74867?
CVE-2026-74867 is a medium vulnerability published on August 17, 2026. SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth() that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform…
When was CVE-2026-74867 disclosed?
CVE-2026-74867 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74867 actively exploited?
CVE-2026-74867 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.9% of all scored CVEs.
What is the CVSS score of CVE-2026-74867?
CVE-2026-74867 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2026-74867?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74867, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-74867

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