CVE-2026-40039 Pachno 1.0.6 Open Redirection via return_to Parameter
Attackers can redirect users to malicious sites via the return_to parameter, facilitating phishing and credential theft in Pachno.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-40039?
CVE-2026-40039 is a high-severity vulnerability in Pachno, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Pachno 1.0.6 contains an open redirection vulnerability that allows attackers to redirect users to arbitrary external websites by manipulating the return_to parameter. Attackers can craft malicious login URLs with unvalidated return_to values to conduct phishing attacks and steal user credentials.
Weakness: CWE-305
Which versions are affected by CVE-2026-40039?
How do I fix CVE-2026-40039?
No fix has been published for CVE-2026-40039 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40039 being exploited?
There is no known exploitation of CVE-2026-40039 in the wild and no public exploit code.
Sources
Also known as GHSA-qx2h-p95p-57w8.