VDB-341162 · CVE-2026-0960 · EUVD-2026-2438

Wireshark up to 4.6.2 HTTP3 Protocol Dissector infinite loop

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4.4	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Wireshark up to 4.6.2. This affects an unknown function of the component HTTP3 Protocol Dissector. Such manipulation leads to infinite loop. This vulnerability is uniquely identified as CVE-2026-0960. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Wireshark up to 4.6.2. It has been rated as problematic. Affected by this issue is an unknown part of the component HTTP3 Protocol Dissector. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. CVE summarizes:

HTTP3 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.2 allows denial of service

The weakness was disclosed by Tom Needham. The advisory is available at wireshark.org. This vulnerability is handled as CVE-2026-0960 since 01/14/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 294997 (Wireshark 4.6.x < 4.6.3 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.6.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (294997), EUVD (EUVD-2026-2438) and CERT Bund (WID-SEC-2026-0116). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

Open Source Wireshark

Productinfo

Type

Packet Analyzer Software

Name

Wireshark

Version

License

open-source

Website

Product: https://www.wireshark.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 4.7
CNA Vector (GitLab): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 294997
Nessus Name: Wireshark 4.6.x < 4.6.3 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Wireshark 4.6.3

Timelineinfo

01/14/2026 Advisory disclosed
01/14/2026 +0 days CVE reserved
01/14/2026 +0 days VulDB entry created
01/23/2026 +9 days VulDB entry last update

Sourcesinfo

Product: wireshark.org

Advisory: wireshark.org
Researcher: Tom Needham
Status: Confirmed

CVE: CVE-2026-0960 (🔒)
GCVE (CVE): GCVE-0-2026-0960
GCVE (VulDB): GCVE-100-341162
EUVD: 🔒
CERT Bund: WID-SEC-2026-0116 - Wireshark: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 01/14/2026 21:39
Updated: 01/23/2026 04:51
Changes: 01/14/2026 21:39 (65), 01/15/2026 04:25 (1), 01/16/2026 08:34 (7), 01/22/2026 03:38 (11), 01/23/2026 04:51 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.