CVE-2026-22043 describes a critical privilege escalation vulnerability in RustFS, a distributed object storage system, affecting versions 1.0.0-alpha.13 through 1.0.0-alpha.78. A flaw in the IAM’s deny_only short-circuit allows a restricted service account or STS credential to self-issue an unrestricted service account, thereby inheriting full parent privileges and bypassing policy restrictions. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.0.0CPE matchmatch criteria | cpe:2.3:a:rustfs:rustfs:1.0.0:alpha13:*:*:*:rust:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:rustfs:rustfs:1.0.0:alpha14:*:*:*:rust:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:rustfs:rustfs:1.0.0:alpha15:*:*:*:rust:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:rustfs:rustfs:1.0.0:alpha16:*:*:*:rust:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:rustfs:rustfs:1.0.0:alpha17:*:*:*:rust:*:* |
CVSS version used by this source: 4.0
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.