CVE-2026-94212: Apache APISIX: unauthenticated impersonation issue in saml-auth

Severity: medium (CVSS 6.4 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-01
Weakness: CWE-347

Description

Improper verification of cryptographic signature vulnerability in Apache APISIX. Any unauthenticated attacker could impersonate any user on every route protected by the saml-auth plugin under default configuration. This issue affects Apache APISIX: from 3.17.0 through 3.18.0. Users are recommended to upgrade to version 3.19.0, which fixes the issue.

Affected products

Apache Software Foundation Apache APISIX: from 3.17.0 through 3.18.0

References

https://lists.apache.org/thread.html/1230fnojnmc7bfz3n0nkt7tkcld9d1sc
http://www.openwall.com/lists/oss-security/2026/10/01/4

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