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CVE-2026-25992

B3log Siyuan path traversal

7.5 HIGHPublic exploitEPSS 0.68%
  1. Published10 Feb 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

B3log Siyuan< 3.5.5

Remediation

Fixed in
B3log Siyuan≥ 3.5.5

References

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Frequently asked

Is CVE-2026-25992 being actively exploited?

CVE-2026-25992 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.68%.

How severe is CVE-2026-25992?

CVE-2026-25992 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.68% probability of exploitation.

Which products are affected by CVE-2026-25992?

Affected products include B3log Siyuan.

How do I fix CVE-2026-25992?

Upgrade affected software to a fixed version, for example B3log Siyuan 3.5.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25992 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.