Apache APISIX up to 3.16.0 authentication replay

Summaryinfo

A vulnerability described as problematic has been identified in Apache APISIX up to 3.16.0. The affected element is an unknown function. Such manipulation leads to authentication replay. This vulnerability is documented as CVE-2026-47341. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apache APISIX up to 3.16.0. It has been rated as problematic. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a authentication replay vulnerability. Using CWE to declare the problem leads to CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at lists.apache.org. This vulnerability is handled as CVE-2026-47341 since 05/19/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/19/2026). The MITRE ATT&CK project declares the attack technique as T1040.

Upgrading to version 3.17.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38024). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Apache

Name

• APISIX

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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Once again VulDB remains the best source for vulnerability data.

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