CVE-2026-85175Public exploitNetwork attack vectorHinoki check available

TLS private key disclosure via incomplete path blocklist

Published Sep 3, 2026 · Updated Sep 3, 2026

Information disclosure in SiYuan 3.8.1 and earlier allows remote authenticated users to retrieve TLS and CA private keys via getFile. IsForbiddenAbsPath in kernel/util/path_guard.go blocks only conf/conf.json, while the getFile handler bypasses that check for the administrator role assigned to authenticated users. Default instances require no auth code; on TLS-enabled deployments, the exposed keys permit captured-traffic decryption and certificate forgery for clients trusting the SiYuan CA.

CVSS severity8.7
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in SiYuan 3.8.1 and earlier allows remote authenticated users to retrieve TLS and CA private keys via getFile. IsForbiddenAbsPath in kernel/util/path_guard.go blocks only conf/conf.json, while the getFile handler bypasses that check for the administrator role assigned to authenticated users. Default instances require no auth code; on TLS-enabled deployments, the exposed keys permit captured-traffic decryption and certificate forgery for clients trusting the SiYuan CA.

The record

CVE
CVE-2026-85175
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-552, T1552.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.8.2

Published CVSS scores

8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties
T1552.004Unsecured Credentials: Private Keys

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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