CVE-2026-40042Network attack vector

Unauthenticated file read via external entity resolution

Published Apr 13, 2026 · Updated Apr 13, 2026

XML external entity injection in Pachno 1.0.6 allows remote attackers to read arbitrary server files through crafted wiki content. The TextParser helper passes attacker-controlled wiki tables and inline tags to simplexml_load_string() without restricting external entity resolution. No authentication or user interaction is required, and successful exploitation exposes files readable by the web-server process.

CVSS severity9.3
Critical
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML external entity injection in Pachno 1.0.6 allows remote attackers to read arbitrary server files through crafted wiki content. The TextParser helper passes attacker-controlled wiki tables and inline tags to simplexml_load_string() without restricting external entity resolution. No authentication or user interaction is required, and successful exploitation exposes files readable by the web-server process.

The record

CVE
CVE-2026-40042
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
Pachno
Product
Pachno
Classifications
CWE-403, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pachno · Pachnoversion=1.0.6

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-403Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')
T1005Data from Local System
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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