Koel up to 9.3.4 DNS Resolution Http::sink server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k4.20-

Summaryinfo

A vulnerability classified as critical has been found in Koel up to 9.3.4. This affects the function Http::sink of the component DNS Resolution Handler. The manipulation leads to server-side request forgery. This vulnerability is documented as CVE-2026-47260. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Koel up to 9.3.4. It has been rated as critical. This issue affects the function Http::sink of the component DNS Resolution Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Koel is a free, open-source music streaming solution. Prior to version 9.3.5, Koel validates the podcast feed URL via the SafeUrl rule (DNS resolution + public IP check), but the individual episode values extracted from the RSS XML are stored directly into the database without any SSRF validation. When a user plays an episode, the server downloads the full HTTP response from the unvalidated enclosure URL via Http::sink()->get() and streams it back to the user, enabling full-read SSRF against internal services. This issue has been patched in version 9.3.5.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-47260 since 05/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 9.3.5 eliminates this vulnerability. Applying the patch 8708f077efd7d8a332b32e954d65bc837f3a413a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-36545). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Koel 9.3.5
Patch: 8708f077efd7d8a332b32e954d65bc837f3a413a

Timelineinfo

05/19/2026 CVE reserved
06/12/2026 +24 days Advisory disclosed
06/12/2026 +0 days VulDB entry created
06/13/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-7j2f-6h2r-6cqc
Status: Confirmed

CVE: CVE-2026-47260 (🔒)
GCVE (CVE): GCVE-0-2026-47260
GCVE (VulDB): GCVE-100-370691
EUVD: 🔒

Entryinfo

Created: 06/12/2026 22:34
Updated: 06/13/2026 09:41
Changes: 06/12/2026 22:34 (67), 06/13/2026 09:41 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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