CVE-2026-40039

MEDIUM 6.5

Pachno 1.0.6 Open Redirection via return_to Parameter

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

9th

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.

CWE	CWE-305
Vendor	pancho
Product	pachno
Published	Apr 13, 2026
Last Updated	Apr 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

pancho / Pachno

1.0.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

zeroscience.mk: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5981.php vulncheck.com: https://www.vulncheck.com/advisories/pachno-open-redirection-via-return-to-parameter

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab