How serious is CVE-2026-29183?

This vulnerability has a CVSS score of 6.1 out of 10, classified as MEDIUM severity. No public exploit code has been identified yet.

Which products are affected by CVE-2026-29183?

CVE-2026-29183 affects b3log siyuan. Check the full CVE details for specific version information.

How do I fix CVE-2026-29183?

To remediate CVE-2026-29183, check for security patches from b3log. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-29183

Medium

|6.1

No Exploit

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to inject malicious JavaScript into the SiYuan web application, which can then execute actions on behalf of a logged-in user if they click on a crafted link. It can be exploited without any authentication, making it particularly dangerous for users who might unknowingly open the link.

Technical Description

SiYuan is a personal knowledge management system. Prior to version 3.5.9, an unauthenticated reflected XSS vulnerability exists in the dynamic icon API endpoint "GET /api/icon/getDynamicIcon" when type=8, attacker-controlled content is embedded into SVG output without escaping. Because the endpoint is unauthenticated and returns image/svg+xml, a crafted URL can inject executable SVG/HTML event handlers (for example onerror) and run JavaScript in the SiYuan web origin. This can be chained to perform authenticated API actions and exfiltrate sensitive data when a logged-in user opens the malicious link. This issue has been patched in version 3.5.9.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

Confidentiality ImpactLow

Integrity ImpactLow

Availability ImpactNone

ScopeChanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$862($500-$1K)

Vendor Response

Grade APatched in 4 days

Quick Information

Published

Mar 6, 2026

about 1 month ago

Last Modified

Mar 10, 2026

28 days ago

Vendor

b3log

Product

siyuan

Related Vulnerabilities

CVE-2026-30926High

This vulnerability allows low-privilege users to modify existing notebook content in the SiYuan knowledge management system, even though they should only have read-only access. It occurs because the system doesn't properly check user permissions, enabling these users to add new content to documents through a specific API.

CVE-2026-29073Medium

This vulnerability allows any logged-in user, including those with just read access, to execute any SQL query on the database, potentially exposing or altering sensitive data. It affects versions prior to 3.6.0 and is fixed in that version, so users should update to secure their systems.