CVE-2026-58417: Gitea REST API Exposes Organization Membership Vulnerability

MODERATE
Advisory Identifier: GHSA-jr5x-6h83-wrxf
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CWE-200 CWE-863
Published
Advisory Summary

CVE-2026-58417 is a MODERATE rest api exposes organization membership vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Gitea libraries in the Go ecosystem. The issue involves rest api exposes organization membership of private organizations to public. Remediation is available by upgrading affected packages to version 1.27.0.

CVE-2026-58417 at a Glance

CVE Identifier CVE-2026-58417
GHSA Identifier GHSA-jr5x-6h83-wrxf
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Gitea
Package Ecosystem Go
Published Date
Last Updated

How to Fix CVE-2026-58417

To remediate this vulnerability, upgrade all affected Gitea dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

gitea.dev fixed: 1.27.0 
Upgrade gitea.dev to 1.27.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for gitea.dev

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-58417, inspect your project dependencies for Gitea:

inspect dependencies for gitea.dev

Analyze the terminal output to locate any version of Gitea in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.27.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Gitea, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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>' 9. 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).

CVE-2026-58417 Affected Gitea Versions

1 component(s)
Fixed Versions:
1.27.0
Product / Package Ecosystem Affected Versions Fixed Version
gitea.dev
golang/gitea.dev
Go
< 1.27.0
1.27.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/go-gitea/gitea/security/advisories/GHSA-jr5x-6h83-wrxf
Gitea Source Repository REPOSITORY
https://github.com/go-gitea/gitea/pull/38145
Security Fix Commit FIX COMMIT
https://github.com/go-gitea/gitea/commit/685b62c60fc595e3612a85f0895471876db56292
Gitea Source Repository REPOSITORY
https://github.com/go-gitea/gitea
Gitea Release RELEASE
https://github.com/go-gitea/gitea/releases/tag/v1.27.0

Frequently Asked Questions

What is CVE-2026-58417?
CVE-2026-58417 is a security vulnerability in Gitea involving REST API exposes organization membership of private organizations to public under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Gitea versions are affected?
Affected versions include releases prior to 1.27.0 across affected packages: gitea.dev.
What version fixes CVE-2026-58417?
Upgrading to 1.27.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gitea.dev affected?
Yes, gitea.dev is affected in releases prior to 1.27.0. Upgrade your dependency to 1.27.0 or later.
What CWE is associated with CVE-2026-58417?
CVE-2026-58417 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Go dependencies for CVE-2026-58417?
Run the dependency tree command: 'inspect dependencies for gitea.dev'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jr5x-6h83-wrxf",
  "modified" : "2026-07-21T20:40:55Z",
  "published" : "2026-07-21T20:40:55Z",
  "aliases" : [ "CVE-2026-58417" ],
  "summary" : "Gitea: REST API exposes organization membership of private organizations to public",
  "details" : "### Summary\n\nThe endpoint  \"/orgs/{org}/public_members/{username}\" + GET exposes organization membership of public members in a private organization.\n\n### PoC\n\n1. Spin up the nightly container of Gitea.\n2. Perform the default installation.\n3. Register a new user (let's call this user \"user1\").\n4. Create a new organization with \"private\" visibility. We will refer to this organization as \"user1org\".\n5. Make the user \"user1\" inside the organization visible.\n6. Log out and register a new user (\"user2\").\n7. Create an access token for \"user2\" with full access to the API.\n8. 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:\n\ncurl -X 'GET' \\\n  'http://localhost:4700/api/v1/orgs/user1org/public_members/user1' \\\n  -H 'accept: application/json' \\\n  -H 'authorization: token <user2-token>'\n\n9. You will receive status code 204, which leaks the organization membership.\n\n### Impact\n\nThe 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).",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "gitea.dev"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.27.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/go-gitea/gitea/security/advisories/GHSA-jr5x-6h83-wrxf"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/go-gitea/gitea/pull/38145"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/go-gitea/gitea/commit/685b62c60fc595e3612a85f0895471876db56292"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/go-gitea/gitea"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/go-gitea/gitea/releases/tag/v1.27.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-21T20:40:55Z",
    "nvd_published_at" : null
  }
}