Security readout for executives and security teams
Plain-English summary
RustFS had an authorization mistake in an admin IAM import API. Users allowed only to export IAM data could also import IAM data, which can change users, groups, policies, and service accounts. This creates a privilege-escalation risk in RustFS deployments before 1.0.0-alpha.79.
Executive priority
Prioritize remediation for any production RustFS deployment using delegated IAM administration. The flaw can let a limited authenticated user alter identities and policies, potentially expanding access. Treat as moderate urgency, higher if admin APIs are broadly reachable or IAM export rights are widely assigned.
Technical view
Before RustFS 1.0.0-alpha.79, ImportIam checked ExportIAMAction instead of ImportIAMAction. A low-privileged authenticated principal with export-only IAM permission could perform privileged IAM write operations. The issue is classified under CWE-285 and CWE-863 with CVSS 4.0 score 5.7.
Likely exposure
Exposure is limited to RustFS deployments running versions before 1.0.0-alpha.79 where principals have IAM export permissions and can reach the admin API. Internet exposure increases operational risk, but the source bundle does not state default exposure conditions.
Exploitation context
The CVSS vector indicates network access, low complexity, low privileges, and no user interaction. The bundle does not identify active exploitation, and the CVE is not marked KEV. No exploit procedure is provided in the cited sources.
Researcher notes
The root cause is an authorization action mismatch in ImportIam. The fix is identified as RustFS 1.0.0-alpha.79. Public source data does not include commit details, exploit code, or evidence of exploitation in the wild.
Mitigation direction
- Upgrade RustFS to version 1.0.0-alpha.79 or later.
- Review vendor advisory for any updated remediation guidance.
- Restrict access to RustFS admin APIs to trusted networks and administrators.
- Review principals with IAM export permissions for least-privilege alignment.
- Audit recent IAM import activity for unexpected changes.
Validation and detection
- Inventory RustFS deployments and record exact versions.
- Confirm all instances are running 1.0.0-alpha.79 or later.
- Review IAM policies granting ExportIAMAction to non-administrators.
- Check logs for IAM import operations by unexpected principals.
- Verify admin API access controls are restricted as intended.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-22042 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.7MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64ccCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.