CVE-2026-56330: Capgo - Open Redirect via Unvalidated Stripe Billing URLs

Severity: low (CVSS 3.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-20 · updated 2026-06-23
Weakness: CWE-601

Description

Capgo before 12.128.2 contains an open redirect vulnerability in stripe_portal and stripe_checkout endpoints that accept unvalidated callbackUrl, successUrl, and cancelUrl parameters. Authenticated attackers can craft malicious billing URLs to redirect users to attacker-controlled domains for phishing and credential harvesting.

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-grc7-98pf-h8hq
https://www.vulncheck.com/advisories/capgo-open-redirect-via-unvalidated-stripe-billing-urls
https://github.com/Cap-go/capgo/security/advisories/GHSA-grc7-98pf-h8hq

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