CVE-2026-26201

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.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security-advisories@github.com

Published

2026-02-19

Last modified

2026-02-19

Weaknesses

CWE-362, CWE-663

Affected products

• Emp3r0r (Jm33-m0)

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