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GHSA-x426-x7cc-3fpc
No affected components available
Impact
Wreck strips credential headers (Authorization, Cookie, Proxy-Authorization) before following a cross-origin redirect, but the origin check compares hostnames only and ignores scheme and port. As a result, credentials are forwarded intact across same-host port changes and HTTPS-to-HTTP downgrades, allowing a co-tenant on an adjacent port or a network-position attacker capable of forging a redirect to capture bearer tokens, session cookies, and proxy credentials and impersonate the victim against the upstream service. The fix replaces the hostname comparison with a full-origin comparison (scheme, host, and port), aligning the behavior with the WHATWG Fetch same-origin definition used by browsers.
Patches
Upgrade to >= 18.1.2.
Workarounds
- Set
redirects: 0(default) and handle redirects manually with a strict origin check. - Use the
beforeRedirecthook to inspect the redirect target and abort or strip sensitive headers before the follow-on request.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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