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1 vulnerability by Alluxio
CVE-2026-79787 (GCVE-0-2026-79787)
Vulnerability from cvelistv5 – Published: 2026-08-25 18:23 – Updated: 2026-08-25 18:55
VLAI
EPSS
VEX
Title
Alluxio through 2.9.5 S3 REST Proxy Authentication Bypass via Unverified Request Signature
Summary
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.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 18:54 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Alluxio/alluxio | product |
| https://github.com/Alluxio/alluxio/issues/18755 | issue-tracking |
| https://github.com/Alluxio/alluxio/blob/v2.9.5/co… | technical-description |
| https://www.vulncheck.com/advisories/alluxio-thro… | third-party-advisory |
Impacted products
Date Public
2026-06-29 00:00
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