CVE-2026-79787

Alluxio's S3 REST proxy fails to verify AWS Signature Version 4 signatures in its default configuration, allowing unauthenticated attackers to spoof user identity. Attackers can extract usernames from unsigned Authorization headers and impersonate any user, including service accounts, to read,...

CVE-2026-79787 Alluxio through 2.9.5 S3 REST Proxy Authentication Bypass via Unverified Request Signature

Alluxio's S3 REST proxy fails to verify AWS Signature Version 4 signatures in its default configuration, allowing unauthenticated attackers to spoof user identity. Attackers can extract usernames from unsigned Authorization headers and impersonate any user, including service accounts, to read,...

PT-2026-81482

Name of the Vulnerable Software and Affected Versions Alluxio affected versions not specified Description The S3 REST proxy fails to verify AWS Signature Version 4 signatures when using the default configuration. This allows unauthenticated attackers to spoof user identity by extracting usernames...