Is CVE-2023-26491 actively exploited?

No active exploitation of CVE-2023-26491 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-26491 be exploited remotely?

Yes. CVE-2023-26491 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-26491?

CVE-2023-26491 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2023-26491

CWE-79Published: March 3, 2023· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

RSSHub is an open source and extensible RSS feed generator. When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. Users who access the deliberately constructed URL are affected. This vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version, there are no known workarounds.

NVD Source

Technical Analysis

CVE-2023-26491 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.