CVE-2026-76918: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Description
A heap-based buffer overflow vulnerability exists in the SSH protocol dissector of Wireshark versions 4.4.0 through 4.4.18 and 4.6.0 through 4.6.7. This flaw can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 5.5medium
Affected software
Wireshark Foundation
Wireshark
pkg:github/wireshark/wiresharkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76918 is a heap-based buffer overflow vulnerability in the SSH protocol dissector component of Wireshark Foundation's Wireshark software. The affected versions include 4.4.0 up to and including 4.4.18, and 4.6.0 up to and including 4.6.7. The vulnerability causes the application to crash when processing certain SSH protocol data, leading to denial of service. The CVSS v3.1 base score is 5.5, indicating a medium severity level, with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation of this vulnerability results in a denial of service by crashing the Wireshark application when dissecting SSH protocol traffic. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
No explicit patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid processing untrusted SSH traffic or use updated versions once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:44:15.542Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8633c5acd9273b49b8ad0d
Added to database: 08/19/2026, 22:52:53 UTC
Last enriched: 09/11/2026, 06:02:51 UTC
Last updated: 10/04/2026, 10:02:29 UTC
Views: 43
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