Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-96423

CVE-2026-96423HIGH

Wireshark Foundation Wireshark — Heap-based Buffer Overflow in Wireshark

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  H  N  H    7.1   .0013    2.4     —

AFFECTED
  Product    Versions  Fixed
  Wireshark  4.6.0 –   —

TIMELINE
  Sep 23  Reserved by GitLab
  Sep 29  Published (CNA: GitLab)
  Oct 6   EXPLOIT PUBLISHED — CVE-2026-96423 (Wireshark Foundation Wireshark). Public exploit reference added.
  Oct 6   RESCORED — CVE-2026-96423 (Wireshark Foundation Wireshark). CVSS 5.5 → 7.1 (NVD).

CWE-125, CWE-122 · CNA: GitLab · CVSS v3.1 · 2 references · NVD status: Analyzed

Description

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

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
September 23, 2026	Reserved	Reserved by GitLab
September 29, 2026	Published	Published (CNA: GitLab)
October 6, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-96423 (Wireshark Foundation Wireshark). Public exploit reference added.
October 6, 2026	RESCORED	RESCORED — CVE-2026-96423 (Wireshark Foundation Wireshark). CVSS 5.5 → 7.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Wireshark Foundation	Wireshark	—	4.6.0	—

Weaknesses

CWE-125 · CWE-122

References (2)

https://gitlab.com/wireshark/wireshark/-/work_items/21563 [Exploit, Vendor Advisory]
https://www.wireshark.org/security/wnpa-sec-2026-108.html [Vendor Advisory]

Authoritative record: CVE-2026-96423 at cve.org

Vendors: wireshark foundation

Weaknesses: CWE-125 · CWE-122

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-96423 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.