CVE-2026-23632: Gogs.io/gogs Gogs User Can Update Repository Vulnerability

MODERATE
Advisory Identifier: GHSA-5qhx-gwfj-6jqr
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CVSS 6.5
CWE-862 CWE-863
Published
Advisory Summary

CVE-2026-23632 is a MODERATE (CVSS 6.5) gogs user can update repository vulnerability (CWE-862: Missing Authorization) affecting Gogs.io/gogs libraries in the Go ecosystem. The issue involves gogs user can update repository content with read-only permission. Remediation is available by upgrading affected packages to version 0.13.4.

CVE-2026-23632 at a Glance

CVE Identifier CVE-2026-23632
GHSA Identifier GHSA-5qhx-gwfj-6jqr
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-862: Missing Authorization
Affected Product Gogs.io/gogs
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-23632

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

gogs.io/gogs fixed: 0.13.4 
Upgrade gogs.io/gogs to 0.13.4
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 gogs.io/gogs

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-23632, inspect your project dependencies for Gogs.io/gogs:

inspect dependencies for gogs.io/gogs

Analyze the terminal output to locate any version of Gogs.io/gogs in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.13.4), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Gogs.io/gogs, 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

## Vulnerability Description The endpoint `PUT /repos/:owner/:repo/contents/*` does not require write permissions and allows access with **read permission only** via `repoAssignment()`. After passing the permission check, `PutContents()` invokes `UpdateRepoFile()`, which results in: * Commit creation * Execution of `git push` As a result, a token with **read-only permission** can be used to modify repository contents. --- ## Attack Prerequisites * Possession of a valid access token * Read permission on the target repository (public repository or collaborator with read access) --- ## Attack Scenario 1. The attacker accesses the target repository with a read-only token 2. The attacker sends a `PUT /contents` request to update an arbitrary file 3. The server creates a commit and performs a git push on behalf of the attacker --- ## Potential Impact * Source code tampering * Injection of backdoors * Compromise of release artifacts and distributed packages

CVE-2026-23632 Affected Gogs.io/gogs Versions

1 component(s)
Fixed Versions:
0.13.4
Product / Package Ecosystem Affected Versions Fixed Version
gogs.io/gogs
golang/gogs.io/gogs
Go
< 0.13.4
0.13.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/gogs/gogs/security/advisories/GHSA-5qhx-gwfj-6jqr
NVD — CVE-2026-23632 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23632
Gogs.io/gogs Source Repository REPOSITORY
https://github.com/gogs/gogs/pull/8102/commits/b6afcdb2e8d291e2adaaf6a8b7f88d240606515d
Gogs.io/gogs Source Repository REPOSITORY
https://github.com/gogs/gogs
Gogs.io/gogs Release RELEASE
https://github.com/gogs/gogs/releases/tag/v0.13.4

Frequently Asked Questions

What is CVE-2026-23632?
CVE-2026-23632 is a security vulnerability in Gogs.io/gogs involving Gogs user can update repository content with read-only permission under CWE-862: Missing Authorization.
Which Gogs.io/gogs versions are affected?
Affected versions include releases prior to 0.13.4 across affected packages: gogs.io/gogs.
What version fixes CVE-2026-23632?
Upgrading to 0.13.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gogs.io/gogs affected?
Yes, gogs.io/gogs is affected in releases prior to 0.13.4. Upgrade your dependency to 0.13.4 or later.
What is the CVSS score of CVE-2026-23632?
CVE-2026-23632 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2026-23632?
CVE-2026-23632 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Go dependencies for CVE-2026-23632?
Run the dependency tree command: 'inspect dependencies for gogs.io/gogs'. 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-5qhx-gwfj-6jqr",
  "modified" : "2026-02-06T19:06:54Z",
  "published" : "2026-02-06T18:10:05Z",
  "aliases" : [ "CVE-2026-23632" ],
  "summary" : " Gogs user can update repository content with read-only permission",
  "details" : "## Vulnerability Description\n\nThe endpoint\n`PUT /repos/:owner/:repo/contents/*`\ndoes not require write permissions and allows access with **read permission only** via `repoAssignment()`.\n\nAfter passing the permission check, `PutContents()` invokes `UpdateRepoFile()`, which results in:\n\n* Commit creation\n* Execution of `git push`\n\nAs a result, a token with **read-only permission** can be used to modify repository contents.\n\n---\n\n## Attack Prerequisites\n\n* Possession of a valid access token\n* Read permission on the target repository\n  (public repository or collaborator with read access)\n\n---\n\n## Attack Scenario\n\n1. The attacker accesses the target repository with a read-only token\n2. The attacker sends a `PUT /contents` request to update an arbitrary file\n3. The server creates a commit and performs a git push on behalf of the attacker\n\n---\n\n## Potential Impact\n\n* Source code tampering\n* Injection of backdoors\n* Compromise of release artifacts and distributed packages",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "gogs.io/gogs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.13.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.13.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/security/advisories/GHSA-5qhx-gwfj-6jqr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23632"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/pull/8102/commits/b6afcdb2e8d291e2adaaf6a8b7f88d240606515d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/gogs/gogs"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/releases/tag/v0.13.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-06T18:10:05Z",
    "nvd_published_at" : "2026-02-06T18:15:56Z"
  }
}