CVE-2026-22043CRITICAL 9.8EPSS p29.4%

CVE-2026-22043CVE-2026-22043

Description

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.38% probability of exploitation · percentile 29.4% · 2026-06-18T12:00:27Z
Published2026-01-08
Last modified2026-01-15

Underlying weaknesses· 3

CWE-269CWE-284CWE-522

References

  1. https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9
  2. https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9

3

TypeTargetConfidenceTier
WeaknessImproper Privilege Managementcwe-2690%live
WeaknessImproper Access Controlcwe-2840%live
WeaknessInsufficiently Protected Credentialscwe-5220%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-22042
CVE
CVE-2026-45043
CVE
CVE-2026-27607
CVE
CVE-2026-45040
CVE
CVE-2025-68926
CVE
CVE-2026-40937
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.