CVE-2026-23863

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Summary

CVECVE-2026-23863
StatePUBLISHED
AssignerMeta
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 16:16:29 UTC
Updated2026-05-11 19:59:52 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS: 0.000110000 probability, percentile 0.013080000 (date 2026-05-12)

Problem Types: CWE-158 | Improper Neutralization of Null Byte or NUL Character (CWE-158) | CWE-158 CWE-158 Improper Neutralization of Null Byte or NUL Character

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:F/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Whatsapp Whatsapp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Facebook WhatsApp Desktop For Windows affected 2.3000.*.252500 2.3000.1032164386.258709 custom Not specified

References

ReferenceSourceLinkTags
www.facebook.com/security/advisories/cve-2026-23863 [email protected] www.facebook.com Third Party Advisory
www.whatsapp.com/security/advisories/2026 [email protected] www.whatsapp.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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