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.
Metrics
Affected Vendors & Products
References
History
Tue, 25 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 25 Aug 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Alluxio through 2.9.5 S3 REST Proxy Authentication Bypass via Unverified Request Signature | |
| First Time appeared |
Alluxio
Alluxio alluxio |
|
| Weaknesses | CWE-287 | |
| CPEs | cpe:2.3:a:alluxio:alluxio:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Alluxio
Alluxio alluxio |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-25T18:55:20.157Z
Reserved: 2026-08-25T14:32:37.763Z
Link: CVE-2026-79787
Updated: 2026-08-25T18:54:36.703Z
Status : Received
Published: 2026-08-25T19:16:54.907
Modified: 2026-08-25T19:16:54.907
Link: CVE-2026-79787
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OpenCVE Enrichment
No data.