Vulnerability in Golang Go

CVE-2021-36221

Go before 1.15.15 and 1.16.x before 1.16.7 has a race condition that can lead to a net/http/httputil ReverseProxy panic upon an ErrAbortHandler abort.

Vulnerability class: Race Condition

EPSS: 0.031 (86.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-36221?
CVE-2021-36221 is a medium-severity vulnerability in Golang Go, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2021-08-08.
How severe is CVE-2021-36221?
Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2021-36221 known to be exploited?
6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.