CVE-2026-42605

Description

AzuraCast is a self-hosted, all-in-one web radio management suite. Prior to version 0.23.6, the currentDirectory request parameter in the Flow.js media upload endpoint (POST /api/station/{station_id}/files/upload) is not sanitized for path traversal sequences. When combined with a local filesystem storage backend (the default), an authenticated user with media management permissions can write arbitrary files outside the station's media storage directory, achieving remote code execution by writing a PHP webshell to the web root. This issue has been patched in version 0.23.6.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0043

Probability of exploitation

0.63%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
azuracast	azuracast	< 0.23.6

References

Advisories & Patches

https://github.com/AzuraCast/AzuraCast/commit/18c793b4427eb49e67a2fea99a89f1c9d9dd808d https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-vp2f-cqqp-478j https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-vp2f-cqqp-478j

Exploits

https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-vp2f-cqqp-478j https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-vp2f-cqqp-478j

Other References

https://github.com/AzuraCast/AzuraCast/releases/tag/0.23.6

Frequently Asked Questions

What is CVE-2026-42605? +

AzuraCast is a self-hosted, all-in-one web radio management suite. Prior to version 0.23.6, the currentDirectory request parameter in the Flow.js media upload endpoint (POST /api/station/{station_id}/files/upload) is not sanitized for path traversal sequences. When combined with a local filesystem storage backend (the default), an authenticated user with media management permissions can write arbitrary files outside the station's media storage directory, achieving remote code execution by writing a PHP webshell to the web root. This issue has been patched in version 0.23.6. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-42605? +

CVE-2026-42605 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0043, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-42605? +

CVE-2026-42605 affects products from azuracast, specifically: azuracast. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-42605? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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