CVE-2026-49872 PUBLISHED

Apache APISIX: Improper authentication in cas-auth plugin

Assigner: apache
Reserved: 02.06.2026 Published: 19.06.2026 Updated: 19.06.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Apache Software Foundation
Product	Apache APISIX
Versions	Default: unaffected affected from 3.0.0 to 3.16.0 (incl.)

Credits

lokerxxx reporter

References

https://lists.apache.org/thread/bzjpo60ygxo7kxdqf7vw3l5zw2lh6m5k

Problem Types

CWE-287 Improper Authentication CWE