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Golang CVE-2026-26201

HIGH
Race Condition (CWE-362)
2026-02-19 security-advisories@github.com GHSA-f5p9-j34q-pwcc
7.5
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 22:03 vuln.today
PoC Detected
Feb 26, 2026 - 02:51 vuln.today
Public exploit code
Patch released
Feb 26, 2026 - 02:51 nvd
Patch available
CVE Published
Feb 19, 2026 - 20:25 nvd
HIGH 7.5

DescriptionGitHub Advisory

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.

AnalysisAI

emp3r0r C2 framework versions prior to 3.21.2 crash due to unsynchronized concurrent map access in Go goroutines, allowing attackers with network access to trigger denial of service against the C2 infrastructure. Public exploit code exists for this vulnerability. The issue is resolved in version 3.21.2 and later.

Technical ContextAI

Classified as CWE-362 (Race Condition). Affects Emp3R0R. 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.

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Leap 15.6 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP5 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6 Fixed
openSUSE Leap 15.5 Fixed

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CVE-2026-26201 vulnerability details – vuln.today

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