CVE-2026-63041 Apache APISIX: attach-consumer-label does not strip client-supplied consumer-label headers

What is CVE-2026-63041?

CVE-2026-63041 is a medium-severity authentication bypass vulnerability in Apache APISIX, published on 26 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Reliance on Untrusted Inputs in a Security Decision vulnerability in Apache APISIX.

This vulnerability allows an attacker to escalate privilege or perform an authorization bypass by sending certain values that the attach-consumer-label plugin does not sanitise correctly.

This issue affects Apache APISIX: from 3.11.0 through 3.17.0.

Users are recommended to upgrade to version 3.18.0, which fixes the issue.

Weakness: CWE-807

Which versions are affected by CVE-2026-63041?

1 open source package ship an affected version, including apisix. It affects 1 product.

Products include Apache Apisix.

How do I fix CVE-2026-63041?

Upgrade apisix to 3.18.0 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-63041 being exploited?

There is no known exploitation of CVE-2026-63041 in the wild and no public exploit code.

Other vulnerabilities in Apache APISIX

• CVE-2022-24112 Apache APISIX Authentication Bypass Exploited Critical 9.8
• CVE-2022-25757 Apache APISIX: the body_schema check in request-validation plugin can be bypassed Critical 9.8
• CVE-2026-31908 Apache APISIX: forward auth plugin allows header injection Critical 9.1
• CVE-2026-75005 Apache APISIX: Unauthenticated CPU-exhaustion DoS High 8.7
• CVE-2025-27446 Privilege escalation in Apache APISIX Java Plugin Runner High 7.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-apisix-2026-63041, GHSA-h244-w3g4-3cv4, MINI-66g2-j7hg-qc4h.