CVE-2026-12986
HighCVSS 7.3Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
A critical vulnerability in the Admin GUI of Payara Server allows an attacker to leak the administrator's REST session token to an attacker-controlled host, potentially leading to a full unauthenticated takeover of the Payara admin domain.
Risk Assessment
The organization is at risk of unauthorized access to the administrative system, which could result in arbitrary code execution through the deployment of malicious software.
Recommendation
It is recommended to immediately update Payara Server to the latest version to mitigate this vulnerability and implement additional protective measures such as CSRF.
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Original NVD description (English source)
A critical vulnerability in Admin GUI in Payara Server Full 4.x, 5.x, 6.x, 7.x, 7.2026.x, 6.2025.x, 6.2024.x on All platforms that allows the attacker to leak the admin gfresttoken to an attacker-controlled host that can result in a full unauthenticated takeover of Payara admin domain. A Server-Side Request Forgery (SSRF) vulnerability in the DownloadServlet of the Admin GUI in Payara Server allows a remote attacker to exfiltrate the administrator's REST session token (gfresttoken) to an attacker-controlled host via a crafted request URL. Combined with the absence of CSRF protection on DownloadServlet, an unauthenticated attacker can trick a logged-in administrator into triggering the token leak, then replay the stolen token to gain full administrative access to the Payara domain, leading to arbitrary code execution via WAR deployment. The vulnerability exists in the DownloadServlet and associated ContentSource implementations (LogViewerContentSource, LogFilesContentSource, LBConfigContentSource, ClientStubsContentSource) within the admingui:console-common module.

