Is this vulnerability remotely exploitable over the internet?

Yes, if Sonarr is reachable from the internet or any untrusted network segment, an unauthenticated attacker can exploit the path traversal to read arbitrary files accessible to the process.

What level of access does an attacker need?

The attacker only needs network access to the Sonarr HTTP interface; no valid credentials or prior foothold on the host are required to attempt exploitation.

What is the safest general fix pattern from a developer perspective?

Apply strict canonicalization of any requested file paths and enforce that the final resolved path remains within a predefined root directory, rejecting any request that escapes this boundary. Combine this with least-privilege filesystem permissions for the service account.

Severity:

HIGH RISK

(8.6)

Path Traversal (CWE-22) in Sonarr File Serving API on Windows

CVE-2026-30976

Published:

Mar 25, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Path Traversal / Directory Traversal

CWE:

CWE-22

Impact:

Unauthenticated Arbitrary File Read on Windows Hosts

Severity:

HIGH RISK

(8.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal / Directory Traversal

CWE:

CWE-22

Impact:

Unauthenticated Arbitrary File Read on Windows Hosts

Severity:

HIGH RISK

(8.6)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Path Traversal (CWE-22) in Sonarr File Serving API on Windows

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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