CVE-2026-73289
Policy-evaluation bug in RustFS allows access-control bypass via negation semantics.
Is CVE-2026-73289 being exploited?
Not confirmed. CVE-2026-73289 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.23% probability of exploitation in the next 30 days.
How severe is CVE-2026-73289?
CVE-2026-73289 is rated High. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-73289?
Yes. A fix has been recorded for CVE-2026-73289. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-73289 affect?
CVE-2026-73289 affects RustFS < 1.0.0-beta.12, crates/policy (policy/function/string.rs). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-73289?
Upgrade to RustFS 1.0.0-beta.12; audit policies and rotate affected credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Access-control bypass: attackers may gain access as excluded principals or bypass Deny guards, affecting jwt:groups and jwt:roles-based auth.
Immediate action required
- affected< 1.0.0-beta.12
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.