Vulnerability · Published Aug 12, 2026 · Assigned by GitHub_M

CVE-2026-73290RustFS: Anonymous ListObjectVersions bypasses RestrictPublicBuckets through the ListBucket fallback

Medium 5.3

In plain English

A medium-severity incorrect authorization in rustfs from rustfs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 63.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.12, an anonymous ListObjectVersions request in rustfs/src/storage/access.rs that lacks a direct bucket-policy grant falls back to an s3:ListBucket check and returns before the policy_allowed path applies deny_anonymous_table_data_plane_if_needed and RestrictPublicBuckets, so a bucket that permits anonymous listing can continue exposing version listings after an operator enables the public-access control. The bypass affects GET /<bucket>?versions= and can disclose object version metadata even though equivalent GetObject requests are denied. This issue is fixed in version 1.0.0-beta.12.

Affected products (as reported)

Vendor	Product	Versions
rustfs	rustfs	< 1.0.0-beta.12

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-x298-9x87-fvjq x_refsource_CONFIRM
https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb x_refsource_MISC
https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12 x_refsource_MISC