CVE-2026-55873

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SeaweedFS is a distributed storage system. In versions 4.08 through 4.33, requests signed with SigV4 service s3tables are routed to the S3Tables management API where authorization collapses account-less S3 identities into the shared admin account and fails open, allowing an authenticated low-privileged S3 user to enumerate administrator-owned table bucket names and ARNs. This issue is fixed in version 4.34.

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
9.9%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 8, 2026

Advisory Details (4)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Improper authorization in the S3Tables / Iceberg REST management API lets a low-privileged S3 user enumerate administrator-owned table buckets · Advisory · seaweedfs/seaweedfs · GitHub

https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hgpf-8634-g44c
github_release Patch Available

4.34

Patch available: seaweedfs/seaweedfs 4.34

https://github.com/seaweedfs/seaweedfs/releases/tag/4.34
github_pr

s3tables: scope management authorization to the caller's identity

Fix merged in seaweedfs/seaweedfs PR #9961 on 2026-06-14 — awaiting tagged release

https://github.com/seaweedfs/seaweedfs/pull/9961
github_commit

commit b13463880c1f (seaweedfs/seaweedfs)

Fix landed in seaweedfs/seaweedfs commit b13463880c1f — awaiting tagged release

https://github.com/seaweedfs/seaweedfs/commit/b13463880c1fa62e255c058a9228b63cc95b4b36

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-14 13:34 UTCEG score recompute
  4. 2026-07-13 22:31 UTCEPSS rescore
  5. 2026-07-13 13:49 UTCEG score recompute
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 14:04 UTCEG score recompute
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 14:17 UTCEG score recompute
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-11 08:27 UTCEPSS rescore
  13. 2026-07-10 14:30 UTCEG score recompute
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 19:10 UTCEPSS rescore
  16. 2026-07-09 14:44 UTCEG score recompute
  17. 2026-07-08 14:58 UTCEG score recompute
  18. 2026-07-08 14:57 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55873?
CVE-2026-55873 is a medium vulnerability published on July 8, 2026. SeaweedFS is a distributed storage system. In versions 4.08 through 4.33, requests signed with SigV4 service s3tables are routed to the S3Tables management API where authorization collapses account-less S3 identities into the shared admin account and fails open, allowing an authenticated…
When was CVE-2026-55873 disclosed?
CVE-2026-55873 was first published in the National Vulnerability Database on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55873 actively exploited?
CVE-2026-55873 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55873?
CVE-2026-55873 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-55873?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55873, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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