GitLab - SSRF (CVE-2021-22175)

CVE-2021-22175 is a server-side request forgery (SSRF) vulnerability in GitLab, affecting all versions from 10.5 onward, that allows unauthenticated attackers to make unauthorized requests to internal network resources via webhooks—even when user registration is disabled. This flaw could be exploited to access sensitive internal services or data, potentially exposing critical infrastructure to further attacks.

CrowdSec has been tracking this vulnerability and its exploits since 13th of January 2026.

CrowdSec network observations suggest that most exploitation of CVE-2021-22175 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2021-22175. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.

Attackers exploit the /api/v4/ci/lint endpoint by sending crafted POST requests with malicious include directives, attempting to trigger server-side requests to attacker-controlled URLs.