How severe is CVE-2026-50551?

CVE-2026-50551 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-50551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50551?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-50551 have an EU (EUVD) identifier?

Yes. CVE-2026-50551 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39128.

When was CVE-2026-50551 published?

CVE-2026-50551 was published on 2026-06-24 and last updated on 2026-06-25.

CVE-2026-50551

CVE-2026-50551 is a critical-severity vulnerability with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39128
Weakness: CWE-79
Published: 2026-06-24
Last modified: 2026-06-25

Description

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan contains a stored cross-site scripting (XSS) vulnerability in the Attribute View (database) asset cell renderer that escalates to remote code execution (RCE) in the Electron desktop client. This vulnerability is fixed in 3.7.0.

Frequently asked questions

What is CVE-2026-50551?: SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan contains a stored cross-site scripting (XSS) vulnerability in the Attribute View (database) asset cell renderer that escalates to remote code execution (RCE) in the Electron desktop client. This vulnerability is fixed in 3.7.0.
How severe is CVE-2026-50551?: CVE-2026-50551 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-50551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-50551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-50551 have an EU (EUVD) identifier?: Yes. CVE-2026-50551 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39128.
When was CVE-2026-50551 published?: CVE-2026-50551 was published on 2026-06-24 and last updated on 2026-06-25.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-56mp-4f3v-fgj2

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