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Vulnerability Details :

CVE-2026-6535

Summary
Assigner-GitLab
Assigner Org ID-ceab7361-8a18-47b1-92ba-4d7d25f6715a
Published At-30 Apr, 2026 | 05:36
Updated At-30 Apr, 2026 | 12:31
Rejected At-
Credits

Improperly Controlled Sequential Memory Allocation in Wireshark

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

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitLab
Assigner Org ID:ceab7361-8a18-47b1-92ba-4d7d25f6715a
Published At:30 Apr, 2026 | 05:36
Updated At:30 Apr, 2026 | 12:31
Rejected At:
â–¼CVE Numbering Authority (CNA)
Improperly Controlled Sequential Memory Allocation in Wireshark

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

Affected Products
Vendor
Wireshark FoundationWireshark Foundation
Product
Wireshark
Default Status
unaffected
Versions
Affected
  • From 4.6.0 before 4.6.5 (semver)
  • From 4.4.0 before 4.4.15 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-1325CWE-1325: Improperly Controlled Sequential Memory Allocation
Type: CWE
CWE ID: CWE-1325
Description: CWE-1325: Improperly Controlled Sequential Memory Allocation
Metrics
VersionBase scoreBase severityVector
3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Upgrade to version 4.6.5 or above

Configurations
Workarounds
Exploits
Credits
finder
Brendan Coles
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.wireshark.org/security/wnpa-sec-2026-26.html
N/A
https://gitlab.com/wireshark/wireshark/-/issues/21097
issue-tracking
permissions-required
https://gitlab.com/wireshark/wireshark/-/issues/21098
issue-tracking
permissions-required
Hyperlink: https://www.wireshark.org/security/wnpa-sec-2026-26.html
Resource: N/A
Hyperlink: https://gitlab.com/wireshark/wireshark/-/issues/21097
Resource:
issue-tracking
permissions-required
Hyperlink: https://gitlab.com/wireshark/wireshark/-/issues/21098
Resource:
issue-tracking
permissions-required
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@gitlab.com
Published At:30 Apr, 2026 | 07:16
Updated At:01 May, 2026 | 18:16

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

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CPE Matches
Wireshark Foundation
wireshark
>>wireshark>>Versions from 4.4.0(inclusive) to 4.4.14(inclusive)
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*
Wireshark Foundation
wireshark
>>wireshark>>Versions from 4.6.0(inclusive) to 4.6.4(inclusive)
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-1325Primarycve@gitlab.com
CWE ID: CWE-1325
Type: Primary
Source: cve@gitlab.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://gitlab.com/wireshark/wireshark/-/issues/21097cve@gitlab.com
Exploit
Issue Tracking
https://gitlab.com/wireshark/wireshark/-/issues/21098cve@gitlab.com
Broken Link
https://www.wireshark.org/security/wnpa-sec-2026-26.htmlcve@gitlab.com
Vendor Advisory
Hyperlink: https://gitlab.com/wireshark/wireshark/-/issues/21097
Source: cve@gitlab.com
Resource:
Exploit
Issue Tracking
Hyperlink: https://gitlab.com/wireshark/wireshark/-/issues/21098
Source: cve@gitlab.com
Resource:
Broken Link
Hyperlink: https://www.wireshark.org/security/wnpa-sec-2026-26.html
Source: cve@gitlab.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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