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Vulnerability Details :

CVE-2026-23863

Summary
Assigner-Meta
Assigner Org ID-4fc57720-52fe-4431-a0fb-3d2c8747b827
Published At-01 May, 2026 | 16:01
Updated At-01 May, 2026 | 17:41
Rejected At-
Credits

An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents with embedded NUL bytes in the filename to be shown in the application as one type of file but run as an executable when opened. We have not seen evidence of exploitation in the wild.

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)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Meta
Assigner Org ID:4fc57720-52fe-4431-a0fb-3d2c8747b827
Published At:01 May, 2026 | 16:01
Updated At:01 May, 2026 | 17:41
Rejected At:
▼CVE Numbering Authority (CNA)

An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents with embedded NUL bytes in the filename to be shown in the application as one type of file but run as an executable when opened. We have not seen evidence of exploitation in the wild.

Affected Products
Vendor
FacebookFacebook
Product
WhatsApp Desktop for Windows
Default Status
unaffected
Versions
Affected
  • From 2.3000.*.252500 before 2.3000.1032164386.258709 (custom)
Problem Types
TypeCWE IDDescription
N/AN/AImproper Neutralization of Null Byte or NUL Character (CWE-158)
Type: N/A
CWE ID: N/A
Description: Improper Neutralization of Null Byte or NUL Character (CWE-158)
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:F/RL:O/RC:C
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:F/RL:O/RC:C
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.facebook.com/security/advisories/cve-2026-23863
x_refsource_CONFIRM
https://www.whatsapp.com/security/advisories/2026
x_refsource_CONFIRM
Hyperlink: https://www.facebook.com/security/advisories/cve-2026-23863
Resource:
x_refsource_CONFIRM
Hyperlink: https://www.whatsapp.com/security/advisories/2026
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-158CWE-158 Improper Neutralization of Null Byte or NUL Character
Type: CWE
CWE ID: CWE-158
Description: CWE-158 Improper Neutralization of Null Byte or NUL Character
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
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve-assign@fb.com
Published At:01 May, 2026 | 16:16
Updated At:11 May, 2026 | 19:59

An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents with embedded NUL bytes in the filename to be shown in the application as one type of file but run as an executable when opened. We have not seen evidence of exploitation in the wild.

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
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CPE Matches
WhatsApp LLC
whatsapp
>>whatsapp>>Versions before 2.3000.1032164386.258709(exclusive)
cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:windows:*:*
Weaknesses
CWE IDTypeSource
CWE-158Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-158
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://www.facebook.com/security/advisories/cve-2026-23863cve-assign@fb.com
Third Party Advisory
https://www.whatsapp.com/security/advisories/2026cve-assign@fb.com
Vendor Advisory
Hyperlink: https://www.facebook.com/security/advisories/cve-2026-23863
Source: cve-assign@fb.com
Resource:
Third Party Advisory
Hyperlink: https://www.whatsapp.com/security/advisories/2026
Source: cve-assign@fb.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

Similar CVEs

1Records found
CVE-2020-20096
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-6.5||MEDIUM
EPSS-0.34% / 56.63%
||
7 Day CHG~0.00%
Published-23 Mar, 2022 | 21:28
Updated-04 Aug, 2024 | 14:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Whatsapp iOS 2.19.80 and prior and Android 2.19.222 and prior user interface does not properly represent URI messages to the user, which results in URI spoofing via specially crafted messages.

Action-Not Available
Vendor-n/aWhatsApp LLC
Product-whatsappn/a
Details not found