CVE-2026-96423

HIGHNVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.1% (3rd percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.5 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 2026-09-29) is not newer than that change (2026-10-14), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-88714 (ENISA EUVD) · GHSA-969r-pwxc-fjq2 (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
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: 0.1%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (GitLab Inc.) states them: "Upgrade to version 4.6.9 or above".

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

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.
Exploitation0.1% × 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
0.1%
EPSS %ILE
3rd
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.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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

September 29, 2026

Last Modified

October 14, 2026

Advisory Details (2)

Auto-updated Sep 29, 2026
Patch available.
Web page

X11 dissector: out-of-bounds heap read from a stale keysyms-per-keycode width in `keycode2keysymString()` (#21563) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21563
Web page

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-108 X11 protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-108.html

Vendor Advisories for CVE-2026-96423(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (8 versions)
  • every version up to 4.4.19-0+deb13u1: fixed in 4.4.19-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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.

  1. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-27 19:49 UTCEG score recompute
  7. 2026-10-27 19:49 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  8. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-25 13:48 UTCEG score recompute
  12. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-20 17:43 UTCEG score recompute
  17. 2026-10-20 17:43 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  18. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-18 02:57 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-14 04:26 UTCEG score recompute
Show 62 more
  1. 2026-10-14 04:26 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  2. 2026-10-14 04:08 UTCEG score recompute
  3. 2026-10-14 04:08 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  4. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-13 04:08 UTCEG score recompute
  6. 2026-10-13 04:08 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  7. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-12 14:40 UTCEG score recompute
  9. 2026-10-12 01:16 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  10. 2026-10-11 19:11 UTCEG score recompute
  11. 2026-10-11 16:27 UTCEG score recompute
  12. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-11 13:39 UTCEG score recompute
  14. 2026-10-11 12:06 UTCEG score recompute
  15. 2026-10-11 12:06 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  16. 2026-10-10 23:17 UTCEG score recompute
  17. 2026-10-10 23:17 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  18. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-10 10:27 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  20. 2026-10-09 21:37 UTCEG score recompute
  21. 2026-10-09 21:37 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  22. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-09 08:49 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  24. 2026-10-08 19:51 UTCEG score recompute
  25. 2026-10-08 19:51 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  26. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-10-08 06:19 UTCEG score recompute
  28. 2026-10-08 06:19 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  29. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-10-07 17:29 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  31. 2026-10-07 03:41 UTCEG score recompute
  32. 2026-10-07 03:41 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  33. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-10-06 14:52 UTCEG score recompute▲ 1.60
  35. 2026-10-06 14:52 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  36. 2026-10-06 14:50 UTCNVD updateCVSS v3 → 7.1 · severity → HIGH
  37. 2026-10-05 19:54 UTCEG score recompute
  38. 2026-10-05 19:54 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  39. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-10-04 20:17 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  42. 2026-10-03 20:38 UTCEG score recompute
  43. 2026-10-03 20:38 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  44. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-10-02 20:59 UTCEG score recompute
  46. 2026-10-02 20:59 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  47. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-10-01 21:22 UTCEG score recompute
  49. 2026-10-01 21:22 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  50. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-09-30 21:46 UTCEG score recompute
  52. 2026-09-30 21:46 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  53. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  54. 2026-09-29 22:10 UTCEG score recompute
  55. 2026-09-29 22:10 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  56. 2026-09-29 16:40 UTCEG score recompute
  57. 2026-09-29 16:40 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  58. 2026-09-29 15:38 UTCEG score recompute
  59. 2026-09-29 15:38 UTCGHSA enrichmentGHSA-969r-pwxc-fjq2 · GitHub CVSS 5.5
  60. 2026-09-29 10:42 UTCEG score recompute
  61. 2026-09-29 09:44 UTCEG score recomputeFirst assessed: 5.5 MEDIUM
  62. 2026-09-29 09:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-96423?
CVE-2026-96423 is a high-severity vulnerability; its CVE record was published on September 29, 2026. X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
When was the CVE record for CVE-2026-96423 published?
The CVE record for CVE-2026-96423 was published on September 29, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 14, 2026; the record at its source may have been updated since.
Is CVE-2026-96423 actively exploited?
CVE-2026-96423 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-96423?
CVE-2026-96423 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-96423?
A fix for CVE-2026-96423 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (GitLab Inc.) states them: "Upgrade to version 4.6.9 or above". The vendor advisories EchelonGraph has for CVE-2026-96423 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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