vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2023-28434

MinIO is vulnerable to privilege escalation on Linux/MacOS

HIGH
8.8
CVSS Score
Published: March 22, 2023 at 08:44 PM UTC
Updated: June 17, 2026 at 05:47 AM UTC
1 product affected across 1 vendorMinIO

Using minio by minio?

Get instant alerts when new vulnerabilities affect minio - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.8
Exploitation
CISA KEV
Exploit prediction
EPSS 8%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score7.9%

EPSS (Exploit Prediction Scoring System) estimates a 7.9% chance this CVE is exploited in the wild within the next 30 days — higher than 95% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

MinIO contains a security feature bypass vulnerability that allows an attacker to use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket` to conduct privilege escalation. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access.

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Unknown
Added to KEV
Sep 19, 2023
Remediation Due
Oct 10, 2023
1116 days overdue
Notes
https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c
https://nvd.nist.gov/vuln/detail/CVE-2023-28434

Description

Minio is a Multi-Cloud Object Storage framework. Prior to RELEASE.2023-03-20T20-16-18Z, an attacker can use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket`. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access. This issue has been patched in RELEASE.2023-03-20T20-16-18Z. As a workaround, enable browser API access and turn off `MINIO_BROWSER=off`.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MinIO· Minio
95%
v < 2023-03-20t20-16-18zv < RELEASE.2023-03-20T20-16-18Z
Affected range stops below 2023-03-20t20-16-18z, so it looks safe — our inference, not a vendor statement
Affected range stops below RELEASE.2023-03-20T20-16-18Z, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5
x_refsource_MISCExploitIssue Tracking
Source: [email protected]
https://github.com/minio/minio/pull/16849
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-269NVD-CWE-noinfo

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card