CVE-2026-56332: Capgo - Open Redirect via confirmation_url Parameter

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-20 · updated 2026-10-08
Weakness: CWE-601

Description

Capgo before 12.128.2 contains an open redirect vulnerability in the confirm-signup endpoint that allows attackers to redirect users to arbitrary external websites. The confirmation_url parameter is not validated, enabling attackers to craft malicious links for phishing and credential harvesting attacks.

Affected products

Capgo: before 12.128.2 — fixed in 12.128.2

How to fix

Upgrade to a fixed version: Capgo 12.128.2. Check the vendor advisory for mitigations.

References

https://github.com/Cap-go/capgo/security/advisories/GHSA-24q8-ghqq-m8cj
https://www.vulncheck.com/advisories/capgo-open-redirect-via-confirmation-url-parameter
https://github.com/Cap-go/capgo/security/advisories/GHSA-24q8-ghqq-m8cj

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