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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.

PUBLISHED Reserved 2026-04-08 | Published 2026-04-13 | Updated 2026-05-12 | Assigner VulnCheck




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

Problem types

Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

Product status

1.0.6
affected

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab finder

References

www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5984.php (Zero Science Lab Disclosure) third-party-advisory

www.vulncheck.com/...extparser-xml-external-entity-injection (VulnCheck Advisory: Pachno 1.0.6 Wiki TextParser XML External Entity Injection) third-party-advisory

cve.org (CVE-2026-40042)

nvd.nist.gov (CVE-2026-40042)

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