CVE-2026-45343: high-severity vulnerability in Kovah LinkAce
LinkAce - Stored XSS via Unsanitized SSO User's Name Rendered in Admin Audit Log Allows Session Hijacking
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.5epss 0.3%
LinkAce is a self-hosted archive to collect website links. Prior to 2.5.6, LinkAce contains a stored cross-site scripting vulnerability that allows a low-privilege user to execute arbitrary JavaScript in an administrator's browser session. This affects instances configured with SSO/OAuth authentication, which is one of the supported authentication methods in LinkAce. An attacker who sets their OAuth display name to a malicious script and then creates an API token will plant a persistent XSS payload in the audit log. When any admin navigates to /system/audit, the payload executes in the admin's browser context. This enables session cookie theft, CSRF token exfiltration (exposed in the la-app-data meta tag), or any other action the admin can perform. This vulnerability is fixed in 2.5.6.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
Kovah · LinkAceRelated CVEs — Kovah LinkAce
In the same product, most dangerous first.
CVE-2026-45344HIGHLinkAce: Setup database password newline injection enables pre-auth RCE on uninitialized instancesEPSS 0.5%CVE-2024-56508HIGHFile Upload Vulnerability Leading to XSS in LinkAce v1.15.5EPSS 0.4%CVE-2025-62720HIGHLinkAce: Data Exfiltration via Export Functions Allow Access to All Users' Private LinksEPSS 0.4%CVE-2025-62721HIGHLinkAce: Authorization Bypass Allows Unauthorized Access to All Private Links, Lists, and TagsEPSS 0.4%CVE-2026-49436HIGHLinkAce vulnerable to stored XSS via 'javascript:' URI in Bulk Link APIEPSS 0.4%CVE-2025-59424HIGHLinkAce Vulnerable to Stored XSS on the Audit PageEPSS 0.4%