AzuraCast before 0.23.8 Server-Side Request Forgery via Remote Relay URL
AzuraCast (Composer package azuracast/azuracast) before 0.23.8 validates a station's "Remote Relay" URL only for URL syntax and an http/https scheme (Utilities\Urls::parseUserUrl, used by StationRemote::getUrlAsUri) and performs no host or IP address restriction. A user holding only the station-scoped RemoteRelays permission can therefore set a Remote Relay URL pointing at loopback, private-network, or cloud-metadata addresses (e.g. http://127.0.0.1:/ or http://169.254.169.254/latest/meta-data/), and AzuraCast's periodic background Now Playing sync (AbstractRemote::getNowPlayingAsync) will automatically and repeatedly issue HTTP requests to that address, resulting in server-side request forgery against internal resources. This affects the main branch as of commit bcf8754eef3a268ad82c3db4d81f7920c3c28b56 (2026-07-31); no patched version is available at the time of the advisory.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-100848
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 10:54 UTC · Revision 1
Source evidence
AzuraCast before 0.23.8 Server-Side Request Forgery via Remote Relay URL
core-osv · Original sourcePublished 27 Sept 2026, 01:28 UTC
AzuraCast (Composer package azuracast/azuracast) before 0.23.8 validates a station's "Remote Relay" URL only for URL syntax and an http/https scheme (Utilities\Urls::parseUserUrl, used by StationRemote::getUrlAsUri) and performs no host or IP address restriction. A user holding only the station-scoped RemoteRelays permission can therefore set a Remote Relay URL pointing at loopback, private-network, or cloud-metadata addresses (e.g. http://127.0.0.1:/ or http://169.254.169.254/latest/meta-data/), and AzuraCast's periodic background Now Playing sync (AbstractRemote::getNowPlayingAsync) will automatically and repeatedly issue HTTP requests to that address, resulting in server-side request forgery against internal resources. This affects the main branch as of commit bcf8754eef3a268ad82c3db4d81f7920c3c28b56 (2026-07-31); no patched version is available at the time of the advisory.
osv:CVE-2026-100848
Complete source record
{
"id": "0ae120905fc1ab8d0cb90ec26e0c3b1e194b186e59483264a192242f721c96d6",
"url": "https://osv.dev/vulnerability/CVE-2026-100848",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "AzuraCast before 0.23.8 Server-Side Request Forgery via Remote Relay URL",
"summary": "AzuraCast (Composer package azuracast/azuracast) before 0.23.8 validates a station's \"Remote Relay\" URL only for URL syntax and an http/https scheme (Utilities\\Urls::parseUserUrl, used by StationRemote::getUrlAsUri) and performs no host or IP address restriction. A user holding only the station-scoped RemoteRelays permission can therefore set a Remote Relay URL pointing at loopback, private-network, or cloud-metadata addresses (e.g. http://127.0.0.1:/ or http://169.254.169.254/latest/meta-data/), and AzuraCast's periodic background Now Playing sync (AbstractRemote::getNowPlayingAsync) will automatically and repeatedly issue HTTP requests to that address, resulting in server-side request forgery against internal resources. This affects the main branch as of commit bcf8754eef3a268ad82c3db4d81f7920c3c28b56 (2026-07-31); no patched version is available at the time of the advisory.",
"evidence": "osv:CVE-2026-100848",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-100848",
"aliases": [
"CVE-2026-100848",
"GHSA-4h6m-rrxm-7w3m"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/azuracast/azuracast",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "62a30e5342ee8e571e02c832d7d2e9809bc81fae"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.23.8"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.23.8"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"0.23.7",
"0.23.6",
"0.23.5",
"0.23.4",
"0.23.3",
"0.23.2",
"0.23.1",
"0.23.0",
"0.22.1",
"0.22.0",
"0.21.0",
"0.20.4",
"0.20.3",
"0.20.2",
"0.20.1",
"0.20.0",
"0.19.7",
"0.19.6",
"0.19.5",
"0.19.4",
"0.19.3",
"0.19.2",
"0.19.1",
"0.19.0",
"0.18.5",
"0.18.3",
"0.18.2",
"0.18.1",
"0.18.0",
"0.17.7",
"0.17.6",
"0.17.5",
"0.17.4",
"0.17.3",
"0.17.2",
"0.17.1",
"0.17.0",
"0.16.1",
"0.16.0",
"0.15.2",
"0.15.1",
"0.15.0",
"0.14.1",
"0.10.2",
"0.10.1",
"0.10.0",
"0.9.9",
"0.9.8.1",
"0.9.8",
"0.9.7.1",
"0.9.7",
"0.9.6.5",
"0.9.6.2",
"0.9.6.1",
"0.9.6",
"0.9.5.1",
"0.9.5",
"0.9.4.2",
"0.9.4.1",
"0.9.4",
"0.9.3",
"0.9.2",
"0.9.1",
"0.9.0",
"0.8.0",
"0.6.0",
"0.5.0",
"0.3.3",
"0.3.2",
"0.3.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100848.json"
}
}
],
"modified": "2026-10-28T02:30:28.317348573Z",
"provider": "osv",
"references": [
"https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-4h6m-rrxm-7w3m",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100848.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-100848",
"https://www.vulncheck.com/advisories/azuracast-before-0.23.8-server-side-request-forgery-via-remote-relay-url"
],
"provider_metadata": {
"cwe_ids": [
"CWE-918"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100848.json"
}
},
"related_cves": [
{
"value": "CVE-2026-100848",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 494749,
"published_at": "2026-09-27T01:28:42.329+00:00"
}