{"cve":"CVE-2022-21689","nvd":{"published":"2022-01-18T22:15:07.987","modified":"2026-06-17T04:26:46.107","status":"Modified","description":"OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/onionshare/onionshare/releases/tag/v2.5","https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpc","https://github.com/onionshare/onionshare/releases/tag/v2.5","https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpc"],"products":["onionshare:onionshare"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2022-21689","score":0.01347,"percentile":0.71459,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jh82-c5jw-pxpc","url":"https://osv.dev/vulnerability/GHSA-jh82-c5jw-pxpc","summary":"Denial of Service in Onionshare","modified":"2024-10-08T13:00:02.854490Z","packages":[{"ecosystem":"PyPI","name":"onionshare-cli","purl":"pkg:pypi/onionshare-cli","ranges":["<2.5"],"fixed":["2.5"]}]},{"id":"PYSEC-2022-40","url":"https://osv.dev/vulnerability/PYSEC-2022-40","summary":"","modified":"2023-11-08T04:08:08.005765Z","packages":[{"ecosystem":"PyPI","name":"onionshare-cli","purl":"pkg:pypi/onionshare-cli","ranges":["<2.5"],"fixed":["2.5"]}]}],"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."]}