Historical catalog analysis: CISA added this entry on February 18, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2021-22175 is a Server-Side Request Forgery (SSRF) vulnerability identified in GitLab. This flaw allows an attacker to induce the server to make requests to internal network resources, potentially exposing services that are not intended to be accessible from the public internet.
Exposure and applicability
The vulnerability is applicable to GitLab environments where requests to the internal network for webhooks have been enabled. Organizations utilizing cloud services should also consider the implications of BOD 22-01 guidance regarding this exposure. The risk is concentrated on deployments that maintain these specific webhook configurations, as the SSRF path depends on this functionality being active.
Remediation priorities
Based on our analysis, vulnerability management teams should prioritize the following actions to reduce exposure:
- Identify Affected Assets: Locate all GitLab instances and determine if internal network webhooks are enabled. This is a prerequisite for exploitability.
- Apply Vendor Mitigations: Deploy the specific mitigations provided by GitLab to close the SSRF path.
- Evaluate Cloud Configuration: For cloud-hosted environments, review configurations against BOD 22-01 standards to ensure that internal metadata services or other sensitive cloud endpoints are not reachable via the application.
- Decommission Unmitigated Assets: If vendor mitigations cannot be applied or are unavailable for a specific legacy version, the product should be discontinued to eliminate the risk.
How to validate remediation
Verification of this fix requires more than a simple version check. Because the vulnerability is tied to the enablement of internal network webhooks, defenders must verify that the corrective action has actually neutralized the request path.
Validation evidence should include:
* Configuration Audit: Confirmation that the specific settings allowing internal webhook requests have been disabled or restricted according to vendor guidance.
* Network Egress Testing: Authorized testing to confirm that the GitLab application can no longer initiate unauthorized requests to internal-only IP addresses or loopback interfaces.
A successful validation is one where the technical path from the webhook functionality to the internal network is demonstrably closed, rather than simply confirming a patch was installed.
Limits and open questions
While vendor mitigations address the known SSRF vector, residual risk may remain if other undocumented paths to internal resources exist within the environment. It remains unknown whether this vulnerability has been utilized in ransomware campaigns. Furthermore, while CISA has established a remediation deadline of March 11, 2026, for federal agencies, non-federal organizations must determine their own priority based on their specific exposure and risk tolerance.
Source and editorial note
CVE-2021-22175: GitLab Server-Side Request Forgery (SSRF) Vulnerability · Source date: February 18, 2026 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: February 21, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 20, 2026 at 00:29 UTC.
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