Wireshark up to 4.4.14/4.6.4 HTTP Protocol Dissector stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Wireshark up to 4.4.14/4.6.4. This vulnerability affects unknown code of the component HTTP Protocol Dissector. Such manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-6868. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wireshark up to 4.4.14/4.6.4. It has been rated as problematic. Affected by this issue is an unknown functionality of the component HTTP Protocol Dissector. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is availability. CVE summarizes:

HTTP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

The weakness was disclosed by Sharon Brizinov. The advisory is available at wireshark.org. This vulnerability is handled as CVE-2026-6868 since 04/22/2026. 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.

The vulnerability scanner Nessus provides a plugin with the ID 327387 (Amazon Linux 2023 : wireshark-cli, wireshark-devel (ALAS2023-2026-1904)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.4.15 or 4.6.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (327387), EUVD (EUVD-2026-26309) and CERT Bund (WID-SEC-2026-1311). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source Wireshark

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

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

CNA Base Score: 5.5
CNA Vector (GitLab): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 327387
Nessus Name: Amazon Linux 2023 : wireshark-cli, wireshark-devel (ALAS2023-2026-1904)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Wireshark 4.4.15/4.6.5

Timelineinfo

04/22/2026 CVE reserved
04/30/2026 +8 days Advisory disclosed
04/30/2026 +0 days VulDB entry created
07/18/2026 +79 days VulDB entry last update

Sourcesinfo

Product: wireshark.org

Advisory: wireshark.org
Researcher: Sharon Brizinov
Status: Confirmed

CVE: CVE-2026-6868 (🔒)
GCVE (CVE): GCVE-0-2026-6868
GCVE (VulDB): GCVE-100-360242
EUVD: 🔒
CERT Bund: WID-SEC-2026-1311 - Wireshark: Mehrere Schwachstellen

Entryinfo

Created: 04/30/2026 08:08
Updated: 07/18/2026 10:20
Changes: 04/30/2026 08:08 (65), 04/30/2026 09:48 (1), 05/01/2026 03:35 (7), 07/18/2026 10:20 (2)
Complete: 🔍
Cache ID: 216::103

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

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