External risk intelligence

Gitea Migration and Mirroring SSRF Vulnerabilities

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2026-58508

Gitea is commonly deployed as a self-hosted, internet-facing code hosting platform or collaborative web application. Because these services are frequently exposed to the internet to allow remote developer access and webhook integrations, the migration and mirroring functionality is often reachable in typical real-world deployments.

Server-Side Request Forgery

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns two vulnerabilities in Gitea, a self-hosted code hosting platform, related to its migration and mirroring features. These vulnerabilities could allow an attacker to redirect network requests to arbitrary internal or external resources, potentially leading to unauthorized access or data exposure. The main concern is confirming relevance and exposure to your environment.

Server-side requests can be tricked.
Avoids unauthorized access and data exposure.
Confirm if Gitea is in use and exposed.

Attack Path

How an attacker could exploit the issue

An attacker could exploit these vulnerabilities by tricking the Gitea application into accessing a malicious external server through its migration or mirroring features. This could be initiated without any prior authentication, leading to the exposure of sensitive information or potentially allowing the attacker to manipulate data within the Gitea instance.

No authentication needed.
Triggers via migration or mirroring.
Leads to data exposure or manipulation.

Live Threat

Current exploitation, exposure, and threat context

Two Server-Side Request Forgery (SSRF) vulnerabilities in Gitea's migration and mirroring features, when supported by DNS rebinding and missing re-validation, could allow an attacker to make requests to internal or external resources. This could potentially impact the confidentiality and integrity of system data and services accessible from the affected Gitea instance.

Internal network resources.
Malicious DNS responses.
Unauthorized system access.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-world response to this critical SSRF vulnerability likely involves application owners, infrastructure teams, and security operations. The immediate first step is to confirm the presence and accessibility of Gitea instances, identify business-critical deployments, and locate the accountable system owner to plan a targeted remediation.

Application and Infrastructure Owners.
Verify Gitea instance exposure and criticality.
Plan and coordinate Gitea instance updates.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Gitea?

Gitea is a lightweight, self-hosted platform used by teams to host software source code and collaborate on projects. It provides features similar to GitHub, including issue tracking, pull requests, and the ability to migrate or mirror repositories from other services. Organizations often deploy it on their own infrastructure to maintain full control over their development environment and private codebases.

What does CVE-2026-58508 mean by SSRF?

This CVE involves Server-Side Request Forgery (SSRF), categorized as CWE-284 (Improper Access Control). It means an attacker can force the Gitea server to make network requests to destinations it was not intended to reach. Because the application fails to properly validate the target or handle DNS responses, it may inadvertently interact with internal services or external systems, effectively using the server as a proxy to bypass network restrictions.

How are these Gitea migration features triggered?

An attacker triggers this by initiating a repository migration or mirroring request within the application. By providing a malicious URL and utilizing techniques like DNS rebinding, they can bypass security checks. Notably, this does not require any prior authentication; the vulnerability is triggered through the standard automated processes Gitea uses to fetch data from remote servers.

How relevant is this for my Gitea instance?

Halo Surface Signal indicates this is a high-priority concern because Gitea is commonly deployed as an internet-facing service to facilitate remote developer access and webhook connectivity. If your instance is accessible from the internet, it is more likely to be reachable by external threats attempting to exploit these migration and mirroring mechanisms. Internal-only deployments have a smaller attack surface but should still be reviewed.

Do I need to update my Gitea deployment immediately?

Your first step should be to confirm if you are running the affected version and assess your current network exposure. Coordinate with your infrastructure and application teams to verify which instances are critical. Once identified, you should plan and apply the necessary updates provided by the vendor to resolve the flaw, as this is the primary way to secure the migration and mirroring functionality.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.