CVE-2026-1584

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-09. A secondary CVSS source baseline 7.5; 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
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted ClientHello message with an invalid Pre-Shared Key (PSK) binder value during the TLS handshake. This can lead to a NULL pointer dereference, causing the server to crash and resulting in a remote Denial of Service (DoS) condition.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
1.3%
EPSS %ILE
70th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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 low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

April 9, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated May 3, 2026
Patch available. Sources: redhat.
Red HatMentions a patch (unverified)

2435258 – (CVE-2026-1584) CVE-2026-1584 gnutls: gnutls: Remote Denial of Service via crafted ClientHello with invalid PSK binder

https://bugzilla.redhat.com/show_bug.cgi?id=2435258
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-1584
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7477

Vendor Advisories for CVE-2026-1584(2)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatgnutls-main-3.8.12-1.1.hum12026-04-10redhat

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

(6 across 6 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.10-1 ... 3.8.9-3 (7 versions)
  • every version up to 3.8.12-1: fixed in 3.8.12-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 31× 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 276 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 176 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  2. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  3. 2026-10-18 04:01 UTCEG score recompute
  4. 2026-10-17 18:09 UTCEG score recompute
  5. 2026-10-17 18:09 UTCVendor advisory
  6. 2026-10-17 18:09 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  8. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  9. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  10. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  11. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  12. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  13. 2026-10-12 16:31 UTCEG score recompute
  14. 2026-10-11 20:09 UTCEG score recompute
  15. 2026-10-11 17:22 UTCEG score recompute
  16. 2026-10-11 14:54 UTCEG score recompute
  17. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  18. 2026-10-10 19:59 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  19. 2026-10-10 02:33 UTCOSV refresh
  20. 2026-10-09 20:06 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  21. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  22. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  23. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  24. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  25. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.3% · 69th percentile
Show 75 more
  1. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  3. 2026-09-29 15:21 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  5. 2026-09-27 13:47 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  6. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  7. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  8. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  9. 2026-09-16 05:14 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  10. 2026-09-13 16:46 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  11. 2026-09-12 15:00 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  12. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  13. 2026-09-11 09:36 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  14. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  15. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  17. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  18. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  19. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  20. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  21. 2026-09-01 13:50 UTCEG score recompute
  22. 2026-09-01 13:50 UTCVendor advisory
  23. 2026-09-01 13:50 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-09-01 12:22 UTCEG score recompute
  25. 2026-09-01 12:22 UTCVendor advisory
  26. 2026-09-01 12:22 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  27. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  28. 2026-08-31 12:28 UTCEG score recompute
  29. 2026-08-31 12:28 UTCVendor advisory
  30. 2026-08-31 12:28 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-08-31 11:30 UTCEG score recompute
  32. 2026-08-31 11:30 UTCVendor advisory
  33. 2026-08-31 11:30 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  34. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  35. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  36. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  37. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  38. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  39. 2026-08-25 13:48 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  40. 2026-08-24 13:31 UTCEG score recompute
  41. 2026-08-24 13:31 UTCVendor advisory
  42. 2026-08-24 13:31 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  43. 2026-08-24 12:26 UTCEG score recompute
  44. 2026-08-24 12:26 UTCVendor advisory
  45. 2026-08-24 12:26 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  47. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  48. 2026-08-21 13:22 UTCVendor advisory
  49. 2026-08-21 13:22 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-08-21 12:20 UTCEG score recompute
  51. 2026-08-21 12:20 UTCVendor advisory
  52. 2026-08-21 12:20 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-08-21 12:15 UTCEG score recompute
  54. 2026-08-21 12:15 UTCVendor advisory
  55. 2026-08-21 12:15 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  56. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  57. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  58. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  59. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  61. 2026-08-16 07:10 UTCEG score recompute
  62. 2026-08-16 07:10 UTCVendor advisory
  63. 2026-08-16 07:10 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  65. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  66. 2026-08-14 18:23 UTCVendor advisory
  67. 2026-08-14 18:23 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  68. 2026-08-14 05:08 UTCEG score recompute
  69. 2026-08-14 05:08 UTCVendor advisory
  70. 2026-08-14 05:08 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  72. 2026-08-13 09:24 UTCVendor advisory
  73. 2026-08-13 09:24 UTCGHSA enrichmentGHSA-92xv-mw29-x4px · GitHub severity HIGH · GitHub CVSS 7.5
  74. 2026-08-12 19:24 UTCEG score recompute
  75. 2026-08-12 19:24 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-1584?
CVE-2026-1584 is a high-severity vulnerability; its CVE record was published on April 9, 2026. A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted ClientHello message with an invalid Pre-Shared Key (PSK) binder value during the TLS handshake. This can lead to a NULL pointer dereference, causing the server to crash and…
When was CVE-2026-1584 made public?
CVE-2026-1584 was made public on February 9, 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 April 9, 2026. EchelonGraph's copy of the record carries a last-modified date of September 1, 2026; the record at its source may have been updated since.
Is CVE-2026-1584 actively exploited?
CVE-2026-1584 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (70th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-1584?
CVE-2026-1584 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-1584?
A fix for CVE-2026-1584 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-1584 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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