CVE-2026-76887

Analyzed Analyzed - Analysis Complete

Denial of Service in Wireshark Dissection Engine

Publication date: 2026-08-19

Last updated on: 2026-08-31

Assigner: GitLab Inc.

Description

Crash in the Wireshark dissection engine in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-31

Generated

2026-09-09

AI Q&A

2026-08-20

EPSS Evaluated

2026-09-07

NVD

CVE-2026-76887

EUVD

EUVD-2026-63143

Affected Vendors & Products

Vendor	Product	Version / Range
wireshark	wireshark	From 4.6.0 (inc) to 4.6.8 (exc)
wireshark	wireshark	From 4.4.0 (inc) to 4.4.18 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is a crash in the Wireshark dissection engine affecting versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. It allows a denial of service attack by causing the application to crash.

Detection Guidance

This vulnerability is specific to Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. To detect it, check your Wireshark version using the command 'wireshark --version'. If your version falls within the affected range, your system is vulnerable.

Impact Analysis

The vulnerability can cause Wireshark to crash, leading to disruption of network analysis and packet inspection tasks. This may result in temporary loss of functionality for users relying on Wireshark for network troubleshooting or security monitoring.

Compliance Impact

This vulnerability causes a denial of service due to a crash in Wireshark's dissection engine. It does not directly affect compliance with GDPR or HIPAA as it does not involve data breaches or unauthorized access. However, disruption of network analysis tools could indirectly impact monitoring and incident response capabilities required by these regulations.

Mitigation Strategies

Upgrade Wireshark to a version outside the affected range (4.6.0 to 4.6.7 or 4.4.0 to 4.4.18). For example, install version 4.6.8 or later, or 4.4.19 or later, depending on your current branch.

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