SEPTEMBER 17, 2026
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Case File

CVE-2026-79787

CRITICAL · CVSS 9.8 EPSS 0.35% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-25 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Alluxio's S3 REST proxy is vulnerable due to its failure to verify AWS Signature Version 4 signatures in the default configuration, enabling unauthenticated attackers to spoof user identities. This critical vulnerability allows attackers to extract usernames from unsigned Authorization headers, potentially leading to unauthorized access to read, write, and delete arbitrary data. Organizations using Alluxio's S3 REST proxy should prioritize immediate remediation to mitigate the risk of data breaches and identity impersonation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-79787
Severity
CRITICAL
CVSS
9.8
EPSS
0.35%

Original NVD 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.