Vulnerability in Pachno
CVE-2026-40042
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 · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Pachno — versions 1.0.6
- Pancho Pachno — versions 1.0.6
Weakness classification (CWE)
References
- www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5984.php (third-party-advisory)
- www.vulncheck.com/advisories/pachno-wiki-textparser-xml-external-entity-injecti… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-40042?
- CVE-2026-40042 is a critical-severity vulnerability in Pachno, classified under Exposure of File Descriptor to Unintended Control Sphere (File Descriptor Leak). CVSS score: 9.8/10. Published 2026-04-13.
- How severe is CVE-2026-40042?
- Critical severity. CVSS v3 base score is 9.8 out of 10.