CVE-2026-40042 Pachno 1.0.6 Wiki TextParser XML External Entity Injection
Unauthenticated attackers can read arbitrary files via XML external entity injection in Pachno wiki text parsing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40042?
CVE-2026-40042 is a critical vulnerability in Pachno, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-403
Which versions are affected by CVE-2026-40042?
How do I fix CVE-2026-40042?
No fix has been published for CVE-2026-40042 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40042 being exploited?
There is no known exploitation of CVE-2026-40042 in the wild and no public exploit code.
Sources
Also known as GHSA-5j7x-7mp7-c5xc.