CVE-2026-49872 Apache APISIX: Improper authentication in cas-auth plugin
Attackers can bypass authentication in Apache APISIX by using credentials from a different source when the cas-auth plugin is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-49872?
CVE-2026-49872 is a medium-severity authentication bypass vulnerability in Apache APISIX, published on 19 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper Authentication vulnerability in Apache APISIX.
When the cas-auth plugin is used in a route, an attacker can possibly authenticate itself with credentials from a different source. This issue affects Apache APISIX: from 3.0.0 through 3.16.0.
Users are recommended to upgrade to version 3.17.0, which fixes the issue.
Weakness: CWE-287
Which versions are affected by CVE-2026-49872?
1 open source package ship an affected version, including apisix. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
apisix Bitnami | From 3.0.0 | 3.17.0 |
Products include Apache Apisix.
How do I fix CVE-2026-49872?
Upgrade apisix to 3.17.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-49872 being exploited?
There is no known exploitation of CVE-2026-49872 in the wild and no public exploit code.
Other vulnerabilities in Apache APISIX
- CVE-2022-24112 Apache APISIX Authentication Bypass
- CVE-2022-25757 Apache APISIX: the body_schema check in request-validation plugin can be bypassed
- CVE-2026-31908 Apache APISIX: forward auth plugin allows header injection
- CVE-2026-75005 Apache APISIX: Unauthenticated CPU-exhaustion DoS
- CVE-2025-27446 Privilege escalation in Apache APISIX Java Plugin Runner
Sources
Also known as BIT-apisix-2026-49872, GHSA-cxx6-444w-8847, MINI-7vrw-qmw8-2rqq.