CVE-2024-32638: Apache APISIX: Forward-Auth Request Smuggling

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-02 · updated 2026-06-17
Weakness: CWE-444

Description

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in Apache APISIX when using `forward-auth` plugin.This issue affects Apache APISIX: from 3.8.0, 3.9.0. Users are recommended to upgrade to version 3.8.1, 3.9.1 or higher, which fixes the issue.

Affected products

Apache Software Foundation Apache APISIX: 3.8.0, 3.9.0

References

http://www.openwall.com/lists/oss-security/2024/05/02/2
https://lists.apache.org/thread/ngvgxllw4zn4hgngkqw2o225kf9wotov
http://www.openwall.com/lists/oss-security/2024/05/02/2
https://lists.apache.org/thread/ngvgxllw4zn4hgngkqw2o225kf9wotov

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