Is CVE-2026-27458 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-27458, but active exploitation has not been confirmed.

Can CVE-2026-27458 be exploited remotely?

Yes. CVE-2026-27458 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27458?

CVE-2026-27458 has a CVSS score of 5.4 (MEDIUM) and an EPSS exploitation probability of 0.03%.

HOME VULNERABILITIESCVE-2026-27458

MEDIUMPOC

CVE-2026-27458

CWE-80Published: February 21, 2026· Updated: Feb 24, 2026

5.4

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.4th

Official Description

LinkAce is a self-hosted archive to collect website links. Versions 2.4.2 and below have a Stored Cross-site Scripting vulnerability through the Atom feed endpoint for lists (/lists/feed). An authenticated user can inject a CDATA-breaking payload into a list description that escapes the XML CDATA section, injects a native SVG element into the Atom XML document, and executes arbitrary JavaScript directly in the browser when the feed URL is visited. No RSS reader or additional rendering context is required — the browser's native XML parser processes the injected SVG and fires the onload event handler. This vulnerability exists because the lists feed template outputs list descriptions using Blade's raw syntax ({!! !!}) without sanitization inside a CDATA block. The critical detail is that because the output sits inside <![CDATA[...]]>, an attacker can inject the sequence ]]> to close the CDATA section prematurely, then inject arbitrary XML/SVG elements that the browser parses and executes natively as part of the Atom document. This issue has been fixed in version 2.4.3.

NVD Source

Technical Analysis

CVE-2026-27458 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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.

A proof-of-concept (PoC) exploit exists for CVE-2026-27458. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.