Is CVE-2026-40042 actively exploited?

No active exploitation of CVE-2026-40042 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40042 be exploited remotely?

Yes. CVE-2026-40042 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40042?

CVE-2026-40042 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2026-40042

CRITICAL

CVE-2026-40042

CWE-403Published: April 13, 2026· Updated: Apr 17, 2026

9.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.8th

Official Description

Pachno 1.0.6 contains an XML external entity injection vulnerability that allows unauthenticated attackers to read arbitrary files by exploiting unsafe XML parsing in the TextParser helper. Attackers can inject malicious XML entities through wiki table syntax and inline tags in issue descriptions, comments, and wiki articles to trigger entity resolution via simplexml_load_string() without LIBXML_NONET restrictions.

NVD Source

Technical Analysis

CVE-2026-40042 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.