CVE-2026-73286CWE-863broken-access-control

CVE-2026-73286

High · published August 12, 2026

CVSS v3.1

8.1

EPSS

Percentile

35.8

In the wild

Unconfirmed

What it is

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.12, RustFS get_condition_values folds attacker-controlled request headers from HeaderMap into server-derived userid, username, principaltype, groups, versionid, signatureversion, jwt:, and ldap: condition keys, allowing authenticated callers to satisfy identity-based policy conditions. This issue is fixed in version 1.0.0-beta.12.

The record

Technical detail

CVSS v3.1: 8.1 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0: Not supplied
EPSS: 0.00426 · 35.8th percentile
Weakness: CWE-863 · Incorrect Authorization
Published: 2026-08-12T19:18Z

References (4)

https://github.com/rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.agents/skills/security-advisory-lessons/references/advisory-patterns.md?plain=1#L45 · [email protected]https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb · [email protected]https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12 · [email protected]https://github.com/rustfs/rustfs/security/advisories/GHSA-6r96-hmgc-726c · [email protected]

EPSS history

Timeline

12 AUG 14:40Z
RustF: Request headers can populate server-derived IAM condition keys, letting a caller satisfy identity-based policy conditions
cvelistv5