CVE-2026-42011

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

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

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. A secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — Patch released this week

Also known asEUVD-2026-28386 (ENISA EUVD) · GHSA-568w-37qx-3qc6 (GitHub Security Advisories)Source: ENISA EUVD

7.4EG
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: 0.5%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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
0.5%
EPSS %ILE
41st
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 (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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

May 7, 2026

Last Modified

November 11, 2026

Advisory Details (2)

Auto-updated May 7, 2026
Patch available. Sources: redhat.
Red Hat

2467437 – (CVE-2026-42011) CVE-2026-42011 gnutls: gnutls: Security bypass due to incorrect name constraint handling

https://bugzilla.redhat.com/show_bug.cgi?id=2467437
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-42011

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift/ose-rhel-coreos-9:413.92.202611041925-02026-11-11redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202611040941-02026-11-09redhat
redhatopenshift/ose-rhel-coreos-9:4.22.9.8.202610241758-02026-10-27redhat
redhatopenshift/ose-rhel-coreos-9:4.21.9.6.202610241345-02026-10-27redhat
redhatopenshift/ose-rhel-coreos-9:4.20.9.6.202610242033-02026-10-27redhat
redhatcert-manager/cert-manager-operator-bundle:17919662592026-10-14redhat
redhatcert-manager/cert-manager-operator-bundle:17919704842026-10-14redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17913710692026-10-13redhat
redhatcert-manager/cert-manager-operator-rhel9:17917882872026-10-13redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17914597112026-10-13redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17914597592026-10-13redhat
redhatcert-manager/cert-manager-operator-rhel9:17890290762026-10-13redhat
redhatrhai/base-image-neuron-rhel9:17907035422026-10-01redhat
redhatcert-manager/cert-manager-trust-manager-rhel9:17905985932026-09-28redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202608241157-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202608250221-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202608150307-02026-08-31redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202608142238-02026-08-26redhat
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
redhatgnutls-0:3.3.29-9.el7_9.22026-07-22redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202607151909-02026-07-22redhat
redhatgnutls-0:3.7.6-21.el9_2.72026-07-20redhat
redhatgnutls-0:3.8.3-4.el9_4.62026-06-29redhat
redhatlibtasn1-0:4.13-4.el8_8.12026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_4.12026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_6.22026-06-29redhat
redhatgnutls-0:3.8.3-6.el9_6.42026-06-25redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatrhui5/rhua-rhel9:17815257392026-06-16redhat
redhatgnutls-0:3.8.9-9.el10_0.192026-06-16redhat

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

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.1-5 ... 3.7.1-5+deb11u9 (10 versions)
  • every version up to 3.7.1-5+deb11u10: fixed in 3.7.1-5+deb11u10
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.9-2 ... 3.7.9-2+deb12u6 (7 versions)
  • every version up to 3.7.9-2+deb12u7: fixed in 3.7.9-2+deb12u7
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.9-3, 3.8.9-3+deb13u1, 3.8.9-3+deb13u2, 3.8.9-3+deb13u3
  • every version up to 3.8.9-3+deb13u4: fixed in 3.8.9-3+deb13u4
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.10-1 ... 3.8.9-3 (11 versions)
  • every version up to 3.8.13-1: fixed in 3.8.13-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(15)

Data Freshness Timeline

(refreshed 19× in last 7d / 63× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 462 rows 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 362 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-11-11 13:28 UTCEchelonGraph re-scored
  4. 2026-11-11 13:28 UTCVendor advisory
  5. 2026-11-11 13:27 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  6. 2026-11-11 12:49 UTCEchelonGraph re-scored
  7. 2026-11-11 12:49 UTCVendor advisory
  8. 2026-11-11 12:49 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  9. 2026-11-11 07:27 UTCEchelonGraph re-scored
  10. 2026-11-11 07:27 UTCVendor advisory
  11. 2026-11-11 07:27 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  12. 2026-11-11 06:29 UTCEchelonGraph re-scored
  13. 2026-11-11 06:29 UTCVendor advisory
  14. 2026-11-11 06:29 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  15. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-11-09 18:27 UTCEchelonGraph re-scored
  17. 2026-11-09 18:27 UTCVendor advisory
  18. 2026-11-09 18:27 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  19. 2026-11-09 17:20 UTCEchelonGraph re-scored
  20. 2026-11-09 17:20 UTCVendor advisory
  21. 2026-11-09 17:20 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  22. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 75 more
  1. 2026-11-05 21:27 UTCEchelonGraph re-scored
  2. 2026-11-05 21:27 UTCVendor advisory
  3. 2026-11-05 21:27 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  4. 2026-11-05 20:43 UTCEchelonGraph re-scored
  5. 2026-11-05 20:43 UTCVendor advisory
  6. 2026-11-05 20:43 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  7. 2026-11-05 18:59 UTCEchelonGraph re-scored
  8. 2026-11-05 18:59 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  9. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-30 08:26 UTCEchelonGraph re-scored
  17. 2026-10-30 08:26 UTCVendor advisory
  18. 2026-10-30 08:26 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  19. 2026-10-30 07:36 UTCEchelonGraph re-scored
  20. 2026-10-30 07:36 UTCVendor advisory
  21. 2026-10-30 07:36 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  22. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-10-29 06:26 UTCEchelonGraph re-scored
  24. 2026-10-29 06:26 UTCVendor advisory
  25. 2026-10-29 06:26 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  26. 2026-10-29 05:58 UTCEchelonGraph re-scored
  27. 2026-10-29 05:58 UTCVendor advisory
  28. 2026-10-29 05:58 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  29. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  30. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  31. 2026-10-26 20:27 UTCEchelonGraph re-scored
  32. 2026-10-26 20:27 UTCVendor advisory
  33. 2026-10-26 20:27 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  34. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  35. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  36. 2026-10-25 14:29 UTCEchelonGraph re-scored
  37. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  38. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  39. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  40. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  41. 2026-10-21 07:06 UTCEchelonGraph re-scored
  42. 2026-10-21 07:06 UTCVendor advisory
  43. 2026-10-21 07:06 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  44. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  45. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  46. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  47. 2026-10-18 03:41 UTCEchelonGraph re-scored
  48. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  49. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  50. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  51. 2026-10-14 20:33 UTCEchelonGraph re-scored
  52. 2026-10-14 20:33 UTCVendor advisory
  53. 2026-10-14 20:33 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  54. 2026-10-14 19:38 UTCEchelonGraph re-scored
  55. 2026-10-14 19:38 UTCVendor advisory
  56. 2026-10-14 19:38 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  57. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  58. 2026-10-14 04:28 UTCEchelonGraph re-scored
  59. 2026-10-14 04:28 UTCVendor advisory
  60. 2026-10-14 04:28 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  61. 2026-10-14 03:36 UTCEchelonGraph re-scored
  62. 2026-10-14 03:36 UTCVendor advisory
  63. 2026-10-14 03:36 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  64. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  65. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  66. 2026-10-12 16:07 UTCEchelonGraph re-scored
  67. 2026-10-11 19:49 UTCEchelonGraph re-scored
  68. 2026-10-11 17:03 UTCEchelonGraph re-scored
  69. 2026-10-11 14:29 UTCEchelonGraph re-scored
  70. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  71. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  72. 2026-10-10 00:18 UTCEchelonGraph re-scored
  73. 2026-10-10 00:18 UTCVendor advisory
  74. 2026-10-10 00:18 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  75. 2026-10-09 23:36 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-42011?
CVE-2026-42011 is a high-severity vulnerability; its CVE record was published on May 7, 2026. A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate…
When was CVE-2026-42011 made public?
CVE-2026-42011 was made public on April 29, 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 7, 2026. EchelonGraph's copy of the record carries a last-modified date of November 11, 2026; the record at its source may have been updated since.
Is CVE-2026-42011 actively exploited?
CVE-2026-42011 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42011?
CVE-2026-42011 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-42011?
A fix for CVE-2026-42011 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42011 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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