How severe is CVE-2026-25992?

CVE-2026-25992 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-25992 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25992?

CVE-2026-25992 affects B3log Siyuan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25992?

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

Does CVE-2026-25992 have an EU (EUVD) identifier?

Yes. CVE-2026-25992 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6758.

When was CVE-2026-25992 published?

CVE-2026-25992 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-25992

CVE-2026-25992 is a high-severity vulnerability in B3log Siyuan with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6758
Weakness: CWE-22
Affected product: B3log Siyuan
Published: 2026-02-10
Last modified: 2026-06-17

Description

SiYuan is a personal knowledge management system. Prior to 3.5.5, the /api/file/getFile endpoint uses case-sensitive string equality checks to block access to sensitive files. On case-insensitive file systems such as Windows, attackers can bypass restrictions using mixed-case paths and read protected configuration files. This vulnerability is fixed in 3.5.5.

Frequently asked questions

What is CVE-2026-25992?: SiYuan is a personal knowledge management system. Prior to 3.5.5, the /api/file/getFile endpoint uses case-sensitive string equality checks to block access to sensitive files. On case-insensitive file systems such as Windows, attackers can bypass restrictions using mixed-case paths and read protected configuration files. This vulnerability is fixed in 3.5.5.
How severe is CVE-2026-25992?: CVE-2026-25992 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-25992 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25992?: CVE-2026-25992 affects B3log Siyuan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25992?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25992 have an EU (EUVD) identifier?: Yes. CVE-2026-25992 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6758.
When was CVE-2026-25992 published?: CVE-2026-25992 was published on 2026-02-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*

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