Critical severity9.8NVD Advisory· Published Aug 25, 2026
CVE-2026-79787
CVE-2026-79787
Description
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, write, and delete arbitrary data.
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Affected products
1Patches
Vulnerability mechanics
References
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