CVE-2026-47304

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.3% (21st percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 8.1 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-07-20) is not newer than that change (2026-11-01), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-44355 (ENISA EUVD) · GHSA-g8r8-53c2-pm3f (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
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: 0.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.3%
EPSS %ILE
21st
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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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 low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

July 14, 2026

Last Modified

November 1, 2026

Advisory Details (1)

Auto-updated Nov 1, 2026
Patch available. Sources: microsoft.
Microsoft

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304

Vendor Advisories for CVE-2026-47304(18)

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

Patch Availability(20)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntudotnet10 (10.0.110-10.0.10-0ubuntu1~26.04.1) @ resolute2026-11-01ubuntu
redhatdotnet8.0-0:8.0.130-1.el9_62026-08-24redhat
redhatdotnet8.0-0:8.0.130-1.el10_02026-08-24redhat
redhatdotnet9.0-0:9.0.120-1.el9_62026-08-24redhat
redhatdotnet8.0-0:8.0.130-1.el9_42026-08-24redhat
redhatdotnet9.0-0:9.0.120-1.el10_02026-08-24redhat
redhatdotnet9.0-0:9.0.119-1.el10_22026-07-20redhat
redhatdotnet10.0-0:10.0.110-1.el10_22026-07-20redhat
redhatdotnet9.0-0:9.0.119-1.el8_102026-07-20redhat
redhatdotnet9.0-0:9.0.119-1.el9_82026-07-20redhat
redhatdotnet8.0-0:8.0.129-1.el10_22026-07-20redhat
redhatdotnet8-0-main-8.0.29-2.1.hum12026-07-20redhat
redhatdotnet10.0-0:10.0.110-1.el9_82026-07-20redhat
redhatdotnet8.0-0:8.0.129-1.el8_102026-07-20redhat
redhatdotnet10.0-0:10.0.110-1.el8_102026-07-20redhat
redhatdotnet8.0-0:8.0.129-1.el9_82026-07-20redhat
redhatdotnet9-0-main-9.0.119-1.hum12026-07-15redhat
nugetSystem.Security.Cryptography.Xml @ 10.0.10 (fixes >= 10.0.0, <= 10.0.9)—ghsa
nugetSystem.Security.Cryptography.Xml @ 9.0.18 (fixes >= 9.0.0, <= 9.0.17)—ghsa
nugetSystem.Security.Cryptography.Xml @ 8.0.4 (fixes >= 8.0.0, <= 8.0.3)—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)
NuGet(1)
PackageVulnerable rangeFix by version rangeDependents
System.Security.Cryptography.Xml8.0.0, 8.0.1, 8.0.2, 8.0.3
  • 10.0.0 up to 10.0.10: fixed in 10.0.10
  • 9.0.0 up to 9.0.18: fixed in 9.0.18
  • 8.0.0 up to 8.0.4: fixed in 8.0.4
—

Weakness Classification(2)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 26× in last 7d / 85× 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 472 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 372 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 17:38 UTCEG score recompute
  2. 2026-11-01 17:38 UTCVendor advisory
  3. 2026-11-01 17:38 UTCGHSA enrichmentGHSA-g8r8-53c2-pm3f · GitHub severity HIGH · GitHub CVSS 8.1
  4. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-11-01 14:09 UTCVendor advisory
  6. 2026-11-01 14:09 UTCGHSA enrichmentGHSA-g8r8-53c2-pm3f · GitHub severity HIGH · GitHub CVSS 8.1
  7. 2026-11-01 07:47 UTCGHSA enrichmentGHSA-g8r8-53c2-pm3f · GitHub severity HIGH · GitHub CVSS 8.1
  8. 2026-11-01 07:47 UTCEG score recompute
  9. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  10. 2026-10-31 15:43 UTCVendor advisory
  11. 2026-10-30 17:17 UTCEG score recompute
  12. 2026-10-30 17:17 UTCVendor advisory
  13. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-29 18:52 UTCEG score recompute
  15. 2026-10-29 18:52 UTCVendor advisory
  16. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-10-28 20:27 UTCVendor advisory
  18. 2026-10-28 20:07 UTCEG score recompute
  19. 2026-10-28 20:07 UTCVendor advisory
  20. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-10-27 21:41 UTCEG score recompute
  22. 2026-10-27 21:41 UTCVendor advisory
  23. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-26 23:11 UTCEG score recompute
  25. 2026-10-26 23:11 UTCVendor advisory
Show 75 more
  1. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-25 21:21 UTCEG score recompute
  3. 2026-10-25 21:21 UTCVendor advisory
  4. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-25 14:24 UTCEG score recompute
  6. 2026-10-24 22:53 UTCEG score recompute
  7. 2026-10-24 22:53 UTCVendor advisory
  8. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-24 00:28 UTCEG score recompute
  10. 2026-10-24 00:28 UTCVendor advisory
  11. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-10-23 02:01 UTCEG score recompute
  13. 2026-10-23 02:01 UTCVendor advisory
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-10-22 03:34 UTCEG score recompute
  16. 2026-10-22 03:34 UTCVendor advisory
  17. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-10-21 05:08 UTCEG score recompute
  19. 2026-10-21 05:08 UTCVendor advisory
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  21. 2026-10-20 06:43 UTCEG score recompute
  22. 2026-10-20 06:43 UTCVendor advisory
  23. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-10-19 08:15 UTCEG score recompute
  25. 2026-10-19 08:15 UTCVendor advisory
  26. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  27. 2026-10-18 09:46 UTCVendor advisory
  28. 2026-10-18 03:36 UTCEG score recompute
  29. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  30. 2026-10-17 11:20 UTCEG score recompute
  31. 2026-10-17 11:20 UTCVendor advisory
  32. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  33. 2026-10-16 12:52 UTCEG score recompute
  34. 2026-10-16 12:52 UTCVendor advisory
  35. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  36. 2026-10-15 14:25 UTCEG score recompute
  37. 2026-10-15 14:25 UTCVendor advisory
  38. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  39. 2026-10-14 09:06 UTCEG score recompute
  40. 2026-10-14 09:06 UTCVendor advisory
  41. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  42. 2026-10-13 05:59 UTCEG score recompute
  43. 2026-10-13 05:59 UTCVendor advisory
  44. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  45. 2026-10-12 16:02 UTCEG score recompute
  46. 2026-10-12 07:31 UTCVendor advisory
  47. 2026-10-11 19:44 UTCEG score recompute
  48. 2026-10-11 16:59 UTCEG score recompute
  49. 2026-10-11 14:24 UTCEG score recompute
  50. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  51. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  52. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  53. 2026-10-08 19:15 UTCEG score recompute
  54. 2026-10-08 19:15 UTCVendor advisory
  55. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  56. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  57. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  58. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  59. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  60. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  61. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  62. 2026-10-01 12:53 UTCEG score recompute
  63. 2026-10-01 12:53 UTCVendor advisory
  64. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  65. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  66. 2026-09-28 13:16 UTCVendor advisory
  67. 2026-09-28 08:56 UTCEG score recompute
  68. 2026-09-28 08:56 UTCVendor advisory
  69. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  70. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  71. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  72. 2026-09-25 18:40 UTCEG score recompute
  73. 2026-09-25 18:40 UTCVendor advisory
  74. 2026-09-24 09:01 UTCEG score recompute
  75. 2026-09-24 09:01 UTCVendor advisory

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-47304?
CVE-2026-47304 is a critical-severity vulnerability; its CVE record was published on July 14, 2026. Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
When was CVE-2026-47304 made public?
CVE-2026-47304 was made public on July 14, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on July 14, 2026. EchelonGraph's copy of the record carries a last-modified date of November 1, 2026; the record at its source may have been updated since.
Is CVE-2026-47304 actively exploited?
CVE-2026-47304 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-47304?
CVE-2026-47304 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-47304?
A fix for CVE-2026-47304 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-47304 are linked in the Vendor Advisories panel on this page.

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