How to fix CVE-2026-40042?

Within 24 hours: Identify all Pachno 1.0.6 instances in your environment and determine whether anonymous submission is enabled. Audit recent wiki edits, issue comments, and submissions for suspicious XML patterns. Within 7 days: Implement input validation to reject or sanitize XML entities in TextParser inputs; disable SimpleXML's external entity processing by setting LIBXML_NOENT and LIBXML_NONET flags if code review permits; restrict wiki and issue comment permissions to authenticated users only. Within 30 days: Upgrade to Pachno 1.0.7 or later once the vendor releases a patched version, or migrate to alternative project management tools if patches remain unavailable.

CVE-2026-40042

EUVD-2026-22049 CRITICAL

2026-04-13 VulnCheck

GHSA-5j7x-7mp7-c5xc

XXE

9.3

CVSS 4.0

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

Apr 17, 2026 - 15:37 vuln.today

cvss_changed

Analysis Generated

Apr 15, 2026 - 12:32 vuln.today

CVSS Changed

Apr 13, 2026 - 19:37 NVD

9.8 (CRITICAL) 9.3 (CRITICAL)

DescriptionNVD

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.

AnalysisAI

XML External Entity (XXE) injection in Pachno 1.0.6's TextParser helper allows remote unauthenticated attackers to read arbitrary files from the server. The vulnerability is triggered through malicious XML entities embedded in wiki table syntax and inline tags within issue descriptions, comments, or wiki articles, exploiting unsafe simplexml_load_string() calls without LIBXML_NONET protections. …

RemediationAI

Within 24 hours: Identify all Pachno 1.0.6 instances in your environment and determine whether anonymous submission is enabled. Audit recent wiki edits, issue comments, and submissions for suspicious XML patterns. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-40042 vulnerability details – vuln.today

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CVE-2026-40042

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DescriptionNVD

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CVE-2026-40042

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DescriptionNVD

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External POC / Exploit Code