CVE-2026-79787

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-79787
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79787.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-79787
Published
2026-08-25T18:23:15.172Z
Modified
2026-08-27T11:47:51.484406302Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Alluxio through 2.9.5 S3 REST Proxy Authentication Bypass via Unverified Request Signature
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79787.json",
    "cwe_ids": [
        "CWE-287"
    ],
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/alluxio/alluxio

Affected ranges

Type
GIT
Repo
https://github.com/alluxio/alluxio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
3cb752d08f2835003db12b9c661165a59836d1fb
Database specific
Show details 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.9.5"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.2.0
v0.2.1
v0.4.0
v0.4.1
v0.5.0
v1.*
v1.7.0-RC0
v2.*
v2.9.4
v2.9.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79787.json"