CVE-2026-45042
Last modified
CVE-2026-45042 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper authorization in the UploadPartCopy operation allows copying objects across buckets without enforcing destination bucket restrictions on allowed copy sources. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
Description
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper authorization in the UploadPartCopy operation allows copying objects across buckets without enforcing destination bucket restrictions on allowed copy sources. The implementation validates GetObject permission on the source bucket and PutObject on the destination bucket independently, but does not enforce any policy constraints on whether the destination bucket permits the specified copy source. This enables unauthorized cross-bucket data movement. This vulnerability is fixed in 1.0.0-beta.2.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-45042?
How severe is CVE-2026-45042?
How do I fix CVE-2026-45042?
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-45037Tabby (formerly Terminus) is a highly configurable terminal …7.1
- CVE-2026-45038Tabby (formerly Terminus) is a highly configurable terminal …7.8
- CVE-2026-45039RustFS is a distributed object storage system built in Rust.…9.8
- CVE-2026-4504A flaw has been found in eosphoros-ai db-gpt up to 0.7.5. Th…7.3
- CVE-2026-45040RustFS is a distributed object storage system built in Rust.…5.3
- CVE-2026-45041RustFS is a distributed object storage system built in Rust.…8.7
- CVE-2026-45043RustFS is a distributed object storage system built in Rust.…9.3
- CVE-2026-45044RustFS is a distributed object storage system built in Rust.…8.8
- CVE-2026-45045Fiber is an Express inspired web framework written in Go. Pr…5.3
- CVE-2026-45046Gryph provides a security layer for AI coding agents. Prior …5.5
- CVE-2026-45047bird-lg-go is a BIRD looking glass in Go. Prior to 1.4.5, th…7.5
- CVE-2026-4505A vulnerability has been found in eosphoros-ai DB-GPT up to …6.3
Are you affected by CVE-2026-45042?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST