{"cve":"CVE-2026-26201","nvd":{"published":"2026-02-19T20:25:42.770","modified":"2026-06-17T10:25:55.907","status":"Analyzed","description":"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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","score":7.0},"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-362","CWE-663"],"references":["https://github.com/jm33-m0/emp3r0r/commit/ea4d074f081dac6293f3aec38f01def5f08d5af5","https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.2","https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-f5p9-j34q-pwcc"],"products":["jm33-m0:emp3r0r"],"source":"nvd","synced_at":"2026-10-19T22:23:35.260773158+00:00"},"epss":{"cve":"CVE-2026-26201","score":0.00332,"percentile":0.26403,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f5p9-j34q-pwcc","url":"https://osv.dev/vulnerability/GHSA-f5p9-j34q-pwcc","summary":"emp3r0r Affected by Concurrent Map Access DoS (panic/crash)","modified":"2026-02-23T19:41:15.897023Z","packages":[{"ecosystem":"Go","name":"github.com/jm33-m0/emp3r0r/core","purl":"pkg:golang/github.com/jm33-m0/emp3r0r/core","ranges":["<0.0.0-20260212232424-ea4d074f081d"],"fixed":["0.0.0-20260212232424-ea4d074f081d"]}]},{"id":"GO-2026-4504","url":"https://osv.dev/vulnerability/GO-2026-4504","summary":"emp3r0r Affected by Concurrent Map Access DoS (panic/crash) in github.com/jm33-m0/emp3r0r/core","modified":"2026-02-23T19:41:15.897023Z","packages":[{"ecosystem":"Go","name":"github.com/jm33-m0/emp3r0r/core","purl":"pkg:golang/github.com/jm33-m0/emp3r0r/core","ranges":["<0.0.0-20260212232424-ea4d074f081d"],"fixed":["0.0.0-20260212232424-ea4d074f081d"]}]}],"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."]}