CVE-2026-9804

HIGHPre-NVD 7.77.7
EchelonGraph scoreMEDIUM confidence

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

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. A secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
7.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in KubeVirt's virt-exportserver component. An attacker with specific namespace-level access can exploit a path traversal vulnerability in the VMExport directory endpoint. By placing a symbolic link (symlink) within an exported filesystem Persistent Volume Claim (PVC) that points outside its designated mount root, the attacker can read arbitrary files from the exporter pod's filesystem. This leads to information disclosure, potentially exposing sensitive data.

CVSS v3
7.7
EG Score
7.7HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
53rd
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). 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.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

A fix is available. Apply it within your standard update timelines.

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.

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

May 28, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Jun 5, 2026
Patch available. Sources: redhat.
Red Hat

2482487 – (CVE-2026-9804) CVE-2026-9804 kubevirt: kubevirt: VMExport directory symlink escape enables exporter pod file read

https://bugzilla.redhat.com/show_bug.cgi?id=2482487
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-9804

Vendor Advisories for CVE-2026-9804(7)

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

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcontainer-native-virtualization/virt-exportserver-rhel9:17817574102026-06-22redhat
redhatcontainer-native-virtualization/virt-exportserver-rhel9:17819282212026-06-22redhat
redhatcontainer-native-virtualization/virt-exportserver-rhel9:17815909932026-06-22redhat
redhatcontainer-native-virtualization/virt-exportserver-rhel9:17818387122026-06-22redhat
redhatcontainer-native-virtualization/virt-exportserver-rhel9:17820129182026-06-22redhat
gokubevirt.io/kubevirt—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
kubevirt.io/kubevirt—
  • every version through 1.9.0-beta.0: no fix on record
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 40× 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 100 of 459 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. None are among the latest 100 rows. The 359 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  2. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  3. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  4. 2026-10-20 08:29 UTCEG score recompute
  5. 2026-10-20 08:29 UTCVendor advisory
  6. 2026-10-20 08:29 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  7. 2026-10-19 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  9. 2026-10-18 02:56 UTCEG score recompute
  10. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  11. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  12. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  13. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  14. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  15. 2026-10-13 03:59 UTCEG score recompute
  16. 2026-10-13 03:59 UTCVendor advisory
  17. 2026-10-13 03:59 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  18. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  19. 2026-10-12 14:39 UTCEG score recompute
  20. 2026-10-11 19:10 UTCEG score recompute
  21. 2026-10-11 16:25 UTCEG score recompute
  22. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  23. 2026-10-11 13:37 UTCEG score recompute
  24. 2026-10-10 20:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  25. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
Show 75 more
  1. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  3. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  4. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  5. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  6. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  7. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  8. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  9. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  10. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  11. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  12. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-09-14 07:30 UTCEG score recompute
  25. 2026-09-14 07:30 UTCVendor advisory
  26. 2026-09-14 07:30 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  27. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  28. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  29. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  30. 2026-09-11 09:38 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  31. 2026-09-10 13:38 UTCEG score recompute
  32. 2026-09-10 13:38 UTCVendor advisory
  33. 2026-09-10 13:38 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  34. 2026-09-10 12:26 UTCEG score recompute
  35. 2026-09-10 12:26 UTCVendor advisory
  36. 2026-09-10 12:26 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  37. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  38. 2026-09-09 15:32 UTCEG score recompute
  39. 2026-09-09 15:32 UTCVendor advisory
  40. 2026-09-09 15:32 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  41. 2026-09-09 14:21 UTCEG score recompute
  42. 2026-09-09 14:21 UTCVendor advisory
  43. 2026-09-09 14:21 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  44. 2026-09-09 13:40 UTCEG score recompute
  45. 2026-09-09 13:40 UTCVendor advisory
  46. 2026-09-09 13:40 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  47. 2026-09-09 12:38 UTCEG score recompute
  48. 2026-09-09 12:38 UTCVendor advisory
  49. 2026-09-09 12:38 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  50. 2026-09-08 23:02 UTCEG score recompute
  51. 2026-09-08 23:02 UTCVendor advisory
  52. 2026-09-08 23:02 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  53. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  54. 2026-09-08 16:15 UTCEG score recompute
  55. 2026-09-08 16:15 UTCVendor advisory
  56. 2026-09-08 16:15 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  57. 2026-09-07 22:33 UTCEG score recompute
  58. 2026-09-07 22:33 UTCVendor advisory
  59. 2026-09-07 22:33 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  60. 2026-09-07 21:20 UTCVendor advisory
  61. 2026-09-07 21:19 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  62. 2026-09-07 20:59 UTCEG score recompute
  63. 2026-09-07 20:59 UTCVendor advisory
  64. 2026-09-07 20:59 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  65. 2026-09-07 12:38 UTCVendor advisory
  66. 2026-09-07 12:38 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  67. 2026-09-06 21:14 UTCVendor advisory
  68. 2026-09-06 21:14 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  69. 2026-09-06 20:48 UTCEG score recompute
  70. 2026-09-06 20:48 UTCVendor advisory
  71. 2026-09-06 20:48 UTCGHSA enrichmentGHSA-mpmf-3w4r-qfpf · GitHub severity HIGH · GitHub CVSS 7.7
  72. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  73. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  74. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  75. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 41st percentile

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Frequently asked(5)

What is CVE-2026-9804?
CVE-2026-9804 is a high-severity vulnerability; its CVE record was published on May 28, 2026. A flaw was found in KubeVirt's virt-exportserver component. An attacker with specific namespace-level access can exploit a path traversal vulnerability in the VMExport directory endpoint. By placing a symbolic link (symlink) within an exported filesystem Persistent Volume Claim (PVC) that points…
When was CVE-2026-9804 made public?
CVE-2026-9804 was made public on May 28, 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 May 28, 2026. EchelonGraph's copy of the record carries a last-modified date of September 10, 2026; the record at its source may have been updated since.
Is CVE-2026-9804 actively exploited?
CVE-2026-9804 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9804?
CVE-2026-9804 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-9804?
A fix for CVE-2026-9804 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-9804 are linked in the Vendor Advisories panel on this page.

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