CVE-2026-73286 json
RustF: Request headers can populate server-derived IAM condition keys, letting a caller satisfy identity-based policy conditions
published 2026-08-12 2 mo ago modified 2026-09-09 1 mo ago also EUVD-2026-57230
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
Affected products
- rustfs rustfs
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
- github.com /rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb
- github.com /rustfs/rustfs/security/advisories/GHSA-6r96-hmgc-726c
- github.com /rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.agents/skills/security-advisory-lessons/referenc
- github.com /rustfs/rustfs/releases/tag/1.0.0-beta.12
Sources
- CVE List CVE-2026-73286
- NVD CVE-2026-73286
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.