Vulnerability Database

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Total vulnerabilities in the database

CVE-2026-58417 — gitea.dev

Exposure of Sensitive Information to an Unauthorized Actor

Summary

The endpoint "/orgs/{org}/public_members/{username}" + GET exposes organization membership of public members in a private organization.

PoC

  1. Spin up the nightly container of Gitea.
  2. Perform the default installation.
  3. Register a new user (let's call this user "user1").
  4. Create a new organization with "private" visibility. We will refer to this organization as "user1org".
  5. Make the user "user1" inside the organization visible.
  6. Log out and register a new user ("user2").
  7. Create an access token for "user2" with full access to the API.
  8. Use the endpoint "/orgs/{org}/public_members/{username}" + GET with the correct username of "user1", organization name, and access token of "user2" to query whether "user1" is a member of the organization. The following curl command demonstrates the usage:

curl -X 'GET'
'http://localhost:4700/api/v1/orgs/user1org/public_members/user1'
-H 'accept: application/json'
-H 'authorization: token <user2-token>'

  1. You will receive status code 204, which leaks the organization membership.

Impact

The vulnerability discloses organization membership. An information that is not accessible via the web app (the organization is hidden, and therefore, the organization membership on the user's profile page is also hidden).

No technical information available.

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

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