{"id":"CVE-2026-23863","state":"PUBLISHED","title":"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 t","description":"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.","publishedAt":"2026-05-01T16:01:39.565Z","updatedAt":"2026-05-01T17:41:14.681Z","severity":{"score":6.5,"label":"Medium","version":"3.1","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","source":"Meta"},"assigner":"Meta","products":["Facebook WhatsApp Desktop for Windows"],"affected":[{"vendor":"Facebook","product":"WhatsApp Desktop for Windows","defaultStatus":"unaffected","versions":[{"version":"2.3000.*.252500","status":"affected","lessThan":"2.3000.1032164386.258709","versionType":"custom"}]}],"references":["https://www.facebook.com/security/advisories/cve-2026-23863","https://www.whatsapp.com/security/advisories/2026"],"weaknesses":["CWE-158"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23863.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23863","state":"PUBLISHED","datePublished":"2026-05-01T16:01:39.565Z","dateUpdated":"2026-05-01T17:41:14.681Z","assignerShortName":"Meta","assignerOrgId":"4fc57720-52fe-4431-a0fb-3d2c8747b827","dateReserved":"2026-01-16T19:49:26.308Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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":[{"vendor":"Facebook","product":"WhatsApp Desktop for Windows","defaultStatus":"unaffected","versions":[{"version":"2.3000.*.252500","status":"affected","lessThan":"2.3000.1032164386.258709","versionType":"custom"}]}],"references":[{"url":"https://www.facebook.com/security/advisories/cve-2026-23863","tags":["x_refsource_CONFIRM"]},{"url":"https://www.whatsapp.com/security/advisories/2026","tags":["x_refsource_CONFIRM"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"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","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"description":"Improper Neutralization of Null Byte or NUL Character (CWE-158)","lang":"en"}]}],"providerMetadata":{"shortName":"Meta","orgId":"4fc57720-52fe-4431-a0fb-3d2c8747b827","dateUpdated":"2026-05-01T16:15:38.171Z"},"dateAssigned":"2026-04-20T00:00:00.000Z"},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-01T17:40:45.569668Z","id":"CVE-2026-23863","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-158","type":"CWE","lang":"en","description":"CWE-158 Improper Neutralization of Null Byte or NUL Character"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-01T17:41:14.681Z"}}]}}}