CRITICAL 9.3 NVD
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 identi
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.
References
- https://github.com/Alluxio/alluxio
- https://github.com/Alluxio/alluxio/blob/v2.9.5/core/server/proxy/src/main/java/alluxio/pro
- https://github.com/Alluxio/alluxio/issues/18755
- https://www.vulncheck.com/advisories/alluxio-through-2.9.5-s3-rest-proxy-authentication-by
- https://github.com/Alluxio/alluxio/issues/18755
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-08-25 via NVD.
Risk Timeline
CVE Disclosed2026-08-25 · -1 days ago
Remediation Resources
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