CVE-2026-6535
Improperly Controlled Sequential Memory Allocation in Wireshark
Description
Dissection engine zlib decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
INFO
Published Date :
April 30, 2026, 7:16 a.m.
Last Modified :
May 1, 2026, 6:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | ceab7361-8a18-47b1-92ba-4d7d25f6715a | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Wireshark to a version that includes the fix.
- Apply security patches provided by the vendor.
- Restart the application after updating.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-6535.
| URL | Resource |
|---|---|
| https://gitlab.com/wireshark/wireshark/-/issues/21097 | Exploit Issue Tracking |
| https://gitlab.com/wireshark/wireshark/-/issues/21098 | Broken Link |
| https://www.wireshark.org/security/wnpa-sec-2026-26.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-6535 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-6535
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-6535 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-6535 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 01, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (including) 4.4.14 *cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* versions from (including) 4.6.0 up to (including) 4.6.4 Added Reference Type GitLab Inc.: https://gitlab.com/wireshark/wireshark/-/issues/21097 Types: Exploit, Issue Tracking Added Reference Type GitLab Inc.: https://gitlab.com/wireshark/wireshark/-/issues/21098 Types: Broken Link Added Reference Type GitLab Inc.: https://www.wireshark.org/security/wnpa-sec-2026-26.html Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 30, 2026
Action Type Old Value New Value Added Description Dissection engine zlib decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CWE CWE-1325 Added Reference https://gitlab.com/wireshark/wireshark/-/issues/21097 Added Reference https://gitlab.com/wireshark/wireshark/-/issues/21098 Added Reference https://www.wireshark.org/security/wnpa-sec-2026-26.html