CVE-2026-94368

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week

Also known asEUVD-2026-83898 (ENISA EUVD) · GHSA-5p5f-qvx9-whpj (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.1Exploit: None knownExposed services: Not assessed

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

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
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 21, 2026

Last Modified

September 25, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
No fix on record yet. Sources: redhat.
Red Hat

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
Red HatMentions a patch (unverified)

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 9× in last 7d / 69× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 121 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 22 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-29 06:31 UTCEG score recompute
  6. 2026-10-29 06:31 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  9. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-25 13:49 UTCEG score recompute
  12. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-10-21 12:36 UTCEG score recompute
  17. 2026-10-21 12:36 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  18. 2026-10-20 17:45 UTCEG score recompute
  19. 2026-10-20 17:45 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  20. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-10-18 02:58 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
Show 74 more
  1. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-10-13 04:18 UTCEG score recompute
  5. 2026-10-13 04:18 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  6. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-12 14:42 UTCEG score recompute
  8. 2026-10-11 20:16 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  9. 2026-10-11 19:12 UTCEG score recompute
  10. 2026-10-11 16:27 UTCEG score recompute
  11. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-11 13:40 UTCEG score recompute
  13. 2026-10-11 08:08 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-10-10 20:09 UTCEG score recompute
  15. 2026-10-10 20:09 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-10-10 08:10 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  18. 2026-10-09 20:10 UTCEG score recompute
  19. 2026-10-09 20:10 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  20. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-09 08:11 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  22. 2026-10-08 20:13 UTCEG score recompute
  23. 2026-10-08 20:13 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  24. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-08 06:59 UTCEG score recompute
  26. 2026-10-08 06:59 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  27. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  28. 2026-10-07 19:01 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  29. 2026-10-07 07:02 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  30. 2026-10-06 19:04 UTCEG score recompute
  31. 2026-10-06 19:04 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  32. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  33. 2026-10-06 07:01 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  34. 2026-10-05 18:59 UTCEG score recompute
  35. 2026-10-05 18:59 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  36. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-10-05 07:02 UTCEG score recompute
  38. 2026-10-05 07:02 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  39. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  40. 2026-10-04 19:03 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  41. 2026-10-04 07:04 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  42. 2026-10-03 19:06 UTCEG score recompute
  43. 2026-10-03 19:06 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  44. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  45. 2026-10-03 07:08 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  46. 2026-10-02 19:10 UTCEG score recompute
  47. 2026-10-02 19:10 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  48. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-10-02 07:12 UTCEG score recompute
  50. 2026-10-02 07:12 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  51. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-10-01 19:14 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  53. 2026-10-01 07:13 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  54. 2026-09-30 19:15 UTCEG score recompute
  55. 2026-09-30 19:15 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  56. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  57. 2026-09-30 07:14 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  58. 2026-09-29 19:16 UTCEG score recompute
  59. 2026-09-29 19:15 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  60. 2026-09-29 07:04 UTCEG score recompute
  61. 2026-09-29 07:04 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  62. 2026-09-28 19:05 UTCEG score recompute
  63. 2026-09-28 19:05 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  64. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  65. 2026-09-28 07:07 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  66. 2026-09-27 19:10 UTCEG score recompute
  67. 2026-09-27 19:10 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  68. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  69. 2026-09-27 07:12 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  70. 2026-09-26 19:14 UTCEG score recompute
  71. 2026-09-26 19:14 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1
  72. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  73. 2026-09-26 07:15 UTCEG score recompute
  74. 2026-09-26 07:15 UTCGHSA enrichmentGHSA-5p5f-qvx9-whpj · GitHub severity HIGH · GitHub CVSS 7.1

Frequently asked(5)

What is CVE-2026-94368?
CVE-2026-94368 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2026-94368 was made public on September 21, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on September 21, 2026. EchelonGraph's copy of the record carries a last-modified date of September 25, 2026; the record at its source may have been updated since.
Is CVE-2026-94368 actively exploited?
CVE-2026-94368 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-94368?
CVE-2026-94368 has a CVSS base score of 7.1 (the CNA's own assessment, by redhat; NVD's own analysis pending).
How do I remediate CVE-2026-94368?
No fix for CVE-2026-94368 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-94368 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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