CVE-2026-63041 PUBLISHED

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

Assigner: apache
Reserved: 15.07.2026 Published: 26.08.2026 Updated: 26.08.2026

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.

Metrics

CVSS 4.0

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

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	Low
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	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 3.11.0 to 3.17.0 (incl.)

Credits

tonghuaroot reporter

References

https://lists.apache.org/thread/yg9tgn699rz7kyglw82m1775do8frjr4

Problem Types

CWE-807 Reliance on Untrusted Inputs in a Security Decision CWE