CVE-2026-48895: Apache APISIX open redirect in cas-auth plugin

CVE-2026-48895 · Severity: info · CVSS 2.1 · Published 2026-06-19

Apache APISIX, a popular cloud-native API gateway, is vulnerable to a security flaw that allows attackers to redirect users to malicious websites. By manipulating specific web request headers, an attacker can trick the system into sending a user to an untrusted site, which could lead to the theft of sensitive session tokens. This could allow an attacker to impersonate legitimate users and gain unauthorized access to protected applications.

Technologies: Apache APISIX. Vendors: Apache.

Quick answers

Is CVE-2026-48895 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-48895 being exploited in the wild.
How severe is CVE-2026-48895?
Informational severity, with a CVSS score of 2.1, published 19 June 2026.
Which products and versions are affected?
Apache APISIX 3.0.0 through 3.16.0.
Is there a fix for CVE-2026-48895?
A patch was published on 2026-06-19: Fixed in version 3.17.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48895 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-48895?
Check whether you run Apache APISIX at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An open redirect vulnerability (CWE-601) exists in Apache APISIX versions 3.0.0 through 3.16.0. The flaw is rooted in the 'cas-auth' plugin where the 'Host' header can influence the CAS service URL. A remote, unauthenticated attacker can manipulate client headers to force the gateway to redirect a user's browser to an arbitrary external domain. This redirection can be leveraged to leak sensitive session tokens or facilitate phishing attacks. The issue is resolved in version 3.17.0.

Affected products

  • Apache APISIX 3.0.0 through 3.16.0

Timeline

  • 2026-06-19: disclosed
  • 2026-06-19: advisory
  • 2026-06-19: patched: Fixed in version 3.17.0

References

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