CVE-2026-94368

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-21. the CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests containing unsigned x-amz- headers, instead simply dropping them from the signature calculation. This allows an attacker who possesses a valid presigned PUT URL to add an unsigned x-amz-copy-source header, effectively converting a simple upload into a CopyObject operation. This can lead to unauthorized access and copying of any data the original signer is permitted to reach across the entire storage system.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 25, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
Patch available. Sources: redhat.
redhat

2537364 – (CVE-2026-94368) CVE-2026-94368 noobaa-core: noobaa-core: Presigned PUT URL escalation to CopyObject via unsigned x-amz-copy-source header

https://bugzilla.redhat.com/show_bug.cgi?id=2537364
redhat Patch Available

CVE-2026-94368 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-94368

Vendor Advisories for CVE-2026-94368(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 21× 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. 2026-09-25 07:02 UTCEG score recompute
  2. 2026-09-25 07:02 UTCGHSA enrichment
  3. 2026-09-24 19:43 UTCEG score recompute
  4. 2026-09-24 19:43 UTCGHSA enrichment
  5. 2026-09-24 14:04 UTCEPSS rescore
  6. 2026-09-24 07:45 UTCGHSA enrichment
  7. 2026-09-23 19:48 UTCEG score recompute
  8. 2026-09-23 19:48 UTCGHSA enrichment
  9. 2026-09-23 17:54 UTCEPSS rescore
  10. 2026-09-23 07:50 UTCGHSA enrichment
  11. 2026-09-22 19:52 UTCEG score recompute
  12. 2026-09-22 19:52 UTCGHSA enrichment
  13. 2026-09-22 16:01 UTCEPSS rescore
  14. 2026-09-22 09:22 UTCGHSA enrichment
  15. 2026-09-21 21:23 UTCEG score recompute
  16. 2026-09-21 21:23 UTCGHSA enrichment
  17. 2026-09-21 20:48 UTCEG score recompute
  18. 2026-09-21 20:48 UTCGHSA enrichment
  19. 2026-09-21 12:30 UTCEG score recompute
  20. 2026-09-21 11:50 UTCEG score recompute
  21. 2026-09-21 11:50 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-94368?
CVE-2026-94368 is a high vulnerability published on September 21, 2026. A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests…
When was CVE-2026-94368 disclosed?
CVE-2026-94368 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-94368 actively exploited?
CVE-2026-94368 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.8% of all scored CVEs.
What is the CVSS score of CVE-2026-94368?
CVE-2026-94368 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-94368?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-94368, 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

Explore the affected products and dependency analysis for CVE-2026-94368

Explore →

Is Your Infrastructure Affected by CVE-2026-94368?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs