CVE-2026-73288Network attack vector

Retained-object deletion via fail-open bucket metadata handling

Published Aug 12, 2026 · Updated Aug 12, 2026

Protection mechanism failure in RustFS before 1.0.0-rc.1 allows remote authenticated users to delete retained objects through S3 APIs. Object Lock gates in objectlock_sys.rs collapse missing, unreadable, or unparseable bucket metadata into an unlocked state instead of failing closed. Low-privilege S3 delete access and an operational metadata fault are required; successful deletion irreversibly removes COMPLIANCE-retained records.

CVSS severity6.1
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Protection mechanism failure in RustFS before 1.0.0-rc.1 allows remote authenticated users to delete retained objects through S3 APIs. Object Lock gates in objectlock_sys.rs collapse missing, unreadable, or unparseable bucket metadata into an unlocked state instead of failing closed. Low-privilege S3 delete access and an operational metadata fault are required; successful deletion irreversibly removes COMPLIANCE-retained records.

The record

CVE
CVE-2026-73288
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
RustFS
Product
RustFS
Classifications
CWE-754, CWE-693, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.0-rc.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RustFS · RustFSversion=< 1.0.0-rc.1

Published CVSS scores

6.1GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
CWE-693Protection Mechanism Failure
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo