Platform
javascript
Component
lockerproject-locker
Fixed in
0.0.1
0.0.2
0.1.1
A cross-site scripting (XSS) vulnerability has been identified in LockerProject Locker versions 0.0.0 through 0.1.0. This flaw resides within the authIsAwesome function of the registry.js file, specifically concerning the handling of the ID argument. Successful exploitation allows an attacker to execute arbitrary JavaScript code within a user's browser, potentially leading to session hijacking or data theft. A public exploit is available, increasing the likelihood of active attacks.
The primary impact of CVE-2026-3951 is the potential for remote code execution via XSS. An attacker can craft a malicious payload, often disguised as a legitimate request, that exploits the vulnerability in registry.js. When a user interacts with the affected LockerProject Locker instance, the payload executes in their browser context, granting the attacker control over their session. This can lead to unauthorized access to sensitive data, including user credentials, personal information, and potentially even administrative privileges if the user has elevated access. The public availability of an exploit significantly lowers the barrier to entry for attackers, making this a high-priority concern.
CVE-2026-3951 is currently considered a high-risk vulnerability due to the public availability of an exploit. While no confirmed active campaigns have been reported, the ease of exploitation suggests that attackers may already be scanning for vulnerable instances. The vulnerability was reported to the LockerProject team, but they have not yet responded, indicating a potential lack of ongoing maintenance. Monitor security advisories and community discussions for updates on exploitation activity.
Exploit Status
EPSS
0.04% (12% percentile)
CISA SSVC
CVSS Vector
The recommended mitigation for CVE-2026-3951 is to upgrade to a patched version of LockerProject Locker. As of this writing, no official patch has been released. Until a patch is available, consider implementing input validation and sanitization on the ID parameter within the authIsAwesome function to prevent malicious input from being processed. Web application firewalls (WAFs) configured to detect and block XSS payloads can also provide a layer of defense. Closely monitor application logs for suspicious activity and consider implementing stricter access controls to limit the potential impact of a successful attack.
Update to a patched version of LockerProject Locker. If a patched version is not available, it is recommended to disable or remove the component until a fix is released.
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CVE-2026-3951 is a cross-site scripting (XSS) vulnerability affecting LockerProject Locker versions 0.0.0–0.1.0, allowing attackers to execute malicious scripts in a user's browser.
If you are using LockerProject Locker versions 0.0.0, 0.0.1, or 0.1.0, you are potentially affected by this vulnerability. Upgrade as soon as a patch is available.
The recommended fix is to upgrade to a patched version of LockerProject Locker. Until a patch is released, implement input validation and consider using a WAF.
While no confirmed active campaigns are known, a public exploit exists, increasing the likelihood of exploitation. Vigilance and proactive mitigation are crucial.
As of this writing, no official advisory has been released by LockerProject. Monitor their website and security mailing lists for updates.
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