CVE-2026-72809

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 22.4% of scored records. A rank, not a probability.

NVD base score

7.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/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

NVD analysis status

Deferred. NVD last modified this record on 2026-10-23.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-12 19:07Z2 MO AGO

Last updated

2026-08-14 22:07Z2 MO AGO

Reserved

2026-08-10

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-290Authentication Bypass by SpoofingBase

Data version

5.2

Document digest

0ba725be8433e5013ae99d213ca2d74ca655dd9c9ffb23e99d057ec4844331ae

• github.comGitHub Security Advisory (GHSA-3mp7-4rh5-jrv9)https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3mp7-4rh5-jrv9vendor-advisory
• www.vulncheck.comVulnCheck Advisory: SiYuan before v3.7.4 Authentication Bypass via Localhost Trusthttps://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-localhost-trustthird-party-advisory