Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-48306
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 12:23 UTC · Revision 1
Source evidence
Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF
core-osv · Original sourcePublished 21 Nov 2023, 22:20 UTC
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.
osv:CVE-2023-48306
Complete source record
{
"id": "62c5e003b0cb055e128d9c55d7a81d9c385d6e3a35c195fd906b190ed8dd8c9a",
"url": "https://osv.dev/vulnerability/CVE-2023-48306",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF",
"summary": "Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.",
"evidence": "osv:CVE-2023-48306",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2023-48306",
"aliases": [
"CVE-2023-48306",
"GHSA-8f69-f9jg-4x3v"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/nextcloud/server",
"type": "GIT",
"events": [
{
"introduced": "20ea9a25353129b56d46951fe7d23939665ab2b2"
},
{
"fixed": "97d754dcf1aa3f166ead03a9f6a9165270c73647"
},
{
"introduced": "62cfd3b4c9ff4d8cdbbe6dcc8b63a1085bb94e3d"
},
{
"fixed": "1f6197544b21d1dc9d4cae54a5311b5992e666c6"
},
{
"introduced": "add4e4365a4040d2e4e6aa79c0d03c3edd78583c"
},
{
"fixed": "4ff639eb51629cded66eeef2f4cf56a4c4a81984"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
"range": [
{
"introduced": "25.0.0"
},
{
"fixed": "25.0.11"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
"range": [
{
"introduced": "25.0.0"
},
{
"fixed": "25.0.11"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
"range": [
{
"introduced": "26.0.0"
},
{
"fixed": "26.0.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
"range": [
{
"introduced": "26.0.0"
},
{
"fixed": "26.0.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
"range": [
{
"introduced": "27.0.0"
},
{
"fixed": "27.1.0"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
"range": [
{
"introduced": "27.0.0"
},
{
"fixed": "27.1.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v27.1.0rc4",
"v27.1.0rc3",
"v25.0.11rc1",
"v26.0.6rc1",
"v27.1.0rc2",
"v27.1.0rc1",
"v27.1.0beta3",
"v27.1.0beta2",
"v25.0.10",
"v26.0.5",
"v27.0.2",
"v25.0.10rc1",
"v26.0.5rc1",
"v27.0.2rc1",
"v25.0.9",
"v26.0.4",
"v27.0.1",
"v25.0.9rc2",
"v26.0.4rc2",
"v27.0.1rc2",
"v26.0.4rc1",
"v27.0.1rc1",
"v25.0.9rc1",
"v25.0.8",
"v26.0.3",
"v25.0.8rc2",
"v26.0.3rc2",
"v25.0.8rc1",
"v26.0.3rc1",
"v27.0.0",
"v25.0.7",
"v26.0.2",
"v25.0.7rc1",
"v26.0.2rc1",
"v25.0.6",
"v26.0.1",
"v25.0.6rc1",
"v26.0.1rc1",
"v25.0.5",
"v26.0.0",
"v25.0.5rc1",
"v25.0.4",
"v25.0.4rc1",
"v25.0.3",
"v25.0.3rc2",
"v25.0.3rc1",
"v25.0.2",
"v25.0.2rc3",
"v25.0.2rc2",
"v25.0.2rc1",
"v25.0.1",
"v25.0.1rc1",
"v25.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-48306.json"
}
}
],
"modified": "2026-10-28T02:30:50.776417639Z",
"provider": "osv",
"references": [
"https://hackerone.com/reports/2115212",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48306.json",
"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v",
"https://nvd.nist.gov/vuln/detail/CVE-2023-48306",
"https://github.com/nextcloud/server/pull/40234"
],
"provider_metadata": {
"cwe_ids": [
"CWE-918"
],
"cna_assigner": "GitHub_M",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "22.0.0"
},
{
"fixed": "22.2.10.16"
},
{
"introduced": "23.0.0"
},
{
"fixed": "23.0.12.11"
},
{
"introduced": "24.0.0"
},
{
"fixed": "24.0.12.7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48306.json"
}
},
"related_cves": [
{
"value": "CVE-2023-48306",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519274,
"published_at": "2023-11-21T22:20:28.083+00:00"
}