CVE-2026-73286 json
RustF: Request headers can populate server-derived IAM condition keys, letting a caller satisfy identity-based policy conditions
published 3mo ago modified 2mo ago also EUVD-2026-57230 , GHSA-6r96-hmgc-726c
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository rustfs/rustfs. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- 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
- rustfs rustfs 1.0.0-beta.12
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-11).
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
advisory
- 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
- Maintainer advisory GHSA-6r96-hmgc-726c
Fencer Intel 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.
The maintainers of rustfs/rustfs published their own advisory on GitHub. Reviewed sources take precedence over it.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.