{"cve":"CVE-2022-36436","nvd":{"published":"2022-09-14T11:15:49.567","modified":"2026-06-17T04:53:26.970","status":"Modified","description":"OSU Open Source Lab VNCAuthProxy through 1.1.1 is affected by an vncap/vnc/protocol.py VNCServerAuthenticator authentication-bypass vulnerability that could allow a malicious actor to gain unauthorized access to a VNC session or to disconnect a legitimate user from a VNC session. A remote attacker with network access to the proxy server could leverage this vulnerability to connect to VNC servers protected by the proxy server without providing any authentication credentials. Exploitation of this issue requires that the proxy server is currently accepting connections for the target VNC server.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass/","https://github.com/osuosl/twisted_vncauthproxy/commit/edc149af29242178091b2d6fcd42c3ef0851644b","https://github.com/osuosl/twisted_vncauthproxy/tree/release/1.1.1","https://pypi.org/project/VNCAuthProxy/","https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass/"],"products":["osuosl:twisted_vnc_authentication_proxy"],"source":"nvd","synced_at":"2026-10-19T21:35:14.992143698+00:00"},"epss":{"cve":"CVE-2022-36436","score":0.02072,"percentile":0.8144,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-237r-mx84-7x8c","url":"https://osv.dev/vulnerability/GHSA-237r-mx84-7x8c","summary":"VNCAuthProxy authentication bypass vulnerability","modified":"2024-11-18T23:23:02.309051Z","packages":[{"ecosystem":"PyPI","name":"vncauthproxy","purl":"pkg:pypi/vncauthproxy","ranges":["<1.2.0"],"fixed":["1.2.0"]}]},{"id":"PYSEC-2022-267","url":"https://osv.dev/vulnerability/PYSEC-2022-267","summary":"","modified":"2023-11-08T04:10:02.761071Z","packages":[{"ecosystem":"PyPI","name":"vncauthproxy","purl":"pkg:pypi/vncauthproxy","ranges":["<1.2.0"],"fixed":["1.2.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}