CVE-2026-47341: Apache APISIX: Session replay issue in hmac-auth

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-19 · updated 2026-10-26
Weakness: CWE-294

Description

Authentication Bypass by Capture-replay vulnerability in Apache APISIX. Attacker can benefit from certain configurations in hmac-auth to re-use a token forever, bypassing expiry. This issue affects Apache APISIX: from 3.11.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Affected products

Apache Software Foundation Apache APISIX: from 3.11.0 before 3.17.0 — fixed in 3.17.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache APISIX 3.17.0. Check the vendor advisory for mitigations.

References

https://lists.apache.org/thread/ob6ng9x2hxtyfojs839hs1n0v18xxzf2
http://www.openwall.com/lists/oss-security/2026/06/19/10

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