CVE-2026-40042 | Pachno 1.0.6 contains an XML external entity injection vulne… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-40042
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-04-08 13:39 UTC
Published: 2026-04-13 18:10 UTC
Last updated: 2026-05-12 01:46 UTC
Primary CWE: CWE-403
Exposure of File Descriptor to Unintended Control Sphere ('F…
Vendor / Product: Pachno / Pachno
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Pachno	Pachno	—	1.0.6

Weakness (CWE)

CWE	Source	Description
CWE-403	cna	Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

Zero Science Lab Disclosure https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5984.php
VulnCheck Advisory: Pachno 1.0.6 Wiki TextParser XML External Entity Injection https://www.vulncheck.com/advisories/pachno-wiki-textparser-xml-external-entity-injection