CVE-2026-121535 in MiroTalk P2P
Summary
by MITRE • 11/04/2026
A vulnerability was found in miroslavpejic85 MiroTalk P2P up to 2.0.87. This vulnerability affects the function checkPassword of the file app/src/server.js of the component Room Action Handler. The manipulation results in improper restriction of excessive authentication attempts. It is possible to launch the attack remotely. Attacks of this nature are highly complex. It is stated that the exploitability is difficult. The exploit has been made public and could be used. Upgrading to version 2.1.38 is able to resolve this issue. The patch is identified as 55bec1d05f931d2e43633d6d0b7274f79ec719dd. Upgrading the affected component is advised.
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Analysis
by VulDB Data Team • 11/04/2026
The vulnerability identified in MiroTalk P2P versions up to 2.0.87 represents a critical flaw within the application's authentication mechanism, specifically located in the checkPassword function of the app/src/server.js file under the Room Action Handler component. This issue is classified as an improper restriction of excessive authentication attempts, which aligns with CWE-307, indicating that the system fails to implement adequate controls to prevent brute-force attacks or credential stuffing operations. The architectural design of this specific handler allows for a significant number of unthrottled login requests from remote clients without implementing rate limiting, account lockout policies, or CAPTCHA challenges after repeated failures. This lack of defensive programming creates an exploitable pathway for attackers to systematically guess valid credentials through automated scripts, leveraging the high complexity and difficulty often associated with such attacks not because they are technically hard to execute, but due to the specific network conditions required, yet the public availability of exploits significantly lowers this barrier to entry.
From a tactical perspective, this vulnerability maps directly to MITRE ATT&CK technique T1110, which covers Brute Force operations, and more specifically sub-techniques related to Password Guessing or Password Spraying depending on the attack vector employed by the adversary. The ability to launch these attacks remotely means that threat actors do not need prior access to the internal network, making this a high-risk exposure for any public-facing deployment of MiroTalk P2P. Although initial assessments suggest that exploitability is difficult due to the complexity involved in crafting effective payloads or bypassing potential secondary defenses, the fact that proof-of-concept code has been made public drastically increases the likelihood of automated exploitation by less sophisticated actors who can leverage existing tools rather than developing custom exploits from scratch. This dynamic shifts the risk profile significantly, as the barrier for entry is lowered despite the inherent complexity of the underlying logic flaw.
The operational impact of this vulnerability extends beyond simple unauthorized access to individual rooms. Successful exploitation could lead to a complete compromise of video conferencing sessions, allowing attackers to eavesdrop on sensitive discussions, inject malicious content into active meetings, or disrupt service availability by hijacking room controls. In enterprise environments where MiroTalk P2P might be used for confidential client interactions or internal strategy planning, such a breach constitutes a severe data integrity and confidentiality violation. Furthermore, the persistence of this flaw in older versions highlights the importance of maintaining an up-to-date software inventory to ensure that security patches are applied promptly before they can be weaponized by malicious entities monitoring public vulnerability databases for actionable intelligence.
To mitigate this risk, immediate action is required to upgrade MiroTalk P2P to version 2.1.38 or later, as indicated by the patch identified as commit hash 55bec1d05f931d2e43633d6d0b7274f79ec719dd. This update introduces necessary controls within the checkPassword function to enforce stricter limits on authentication attempts, thereby neutralizing the brute-force attack vector. In addition to upgrading, organizations should implement network-level rate limiting using firewalls or reverse proxies to provide an additional layer of defense against excessive connection requests from single IP addresses. It is also advisable to review access logs for signs of previous exploitation attempts and enforce strong password policies to reduce the success probability of any residual guessing attacks that might bypass technical controls. Continuous monitoring and regular patch management cycles are essential to maintain resilience against evolving threats targeting authentication mechanisms in real-time communication platforms.