{"id":"CVE-2026-26201","aliases":["GHSA-f5p9-j34q-pwcc","GO-2026-4504"],"url":"https://o3.security/vulnerability/CVE-2026-26201","summary":"emp3r0r Affected by Concurrent Map Access DoS (panic/crash)","details":"emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 3.21.2, multiple shared maps are accessed without consistent synchronization across goroutines. Under concurrent activity, Go runtime can trigger `fatal error: concurrent map read and map write`, causing C2 process crash (availability loss). Version 3.21.2 fixes this issue.","published":"2026-02-19T19:21:05.691Z","modified":"2026-07-31T18:30:24.314903040Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/jm33-m0/emp3r0r/core","fixedVersion":"0.0.0-20260212232424-ea4d074f081d"}],"fix":{"url":"https://github.com/jm33-m0/emp3r0r/commit/ea4d074f081dac6293f3aec38f01def5f08d5af5","label":"jm33-m0/emp3r0r@ea4d074"},"references":[{"type":"WEB","url":"https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26201.json"},{"type":"ADVISORY","url":"https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-f5p9-j34q-pwcc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26201"},{"type":"FIX","url":"https://github.com/jm33-m0/emp3r0r/commit/ea4d074f081dac6293f3aec38f01def5f08d5af5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:30:24.314903040Z"}}