Is CVE-2026-40042 in the CISA KEV catalog?

No. CVE-2026-40042 is not currently on the CISA Known Exploited Vulnerabilities list.

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

CVE-2026-40042 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2026-40042?

CVE-2026-40042 has an EPSS score of 0.37% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-40042?

No published fix for CVE-2026-40042 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-40042

CRITICAL

9.8

CVSS v3

NVD

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.

CWE-403

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.37%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-403 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-21626	High	8.6	18%	-	Fix
CVE-2024-58280	High	8.8	0.8%	-	-
CVE-2025-15114	Critical	9.8	0.5%	-	-
CVE-2026-12296	Critical	9.6	0.4%	-	Fix
CVE-2025-3032	High	7.4	0.4%	-	Fix

Embed a live status badge for CVE-2026-40042

Markdown

[![CVE-2026-40042](https://tridentstack.com/cve/badge/CVE-2026-40042.svg)](https://tridentstack.com/cve/CVE-2026-40042)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-40042"><img src="https://tridentstack.com/cve/badge/CVE-2026-40042.svg" alt="CVE-2026-40042"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-17.