Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-23863

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5ba8f34e96bb88b888a15a81e7b7ffc7dde42d3d72533cbb8fd5965107976232
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"Improper Neutralization of Null Byte or NUL Character (CWE-158)","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-158","description":"CWE-158 Improper Neutralization of Null Byte or NUL Character","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"WhatsApp Desktop for Windows","vendor":"Facebook","versions":[{"lessThan":"2.3000.1032164386.258709","status":"affected","version":"2.3000.*.252500","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":6.5,"baseSeverity":"MEDIUM","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","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"Improper Neutralization of Null Byte or NUL Character (CWE-158)","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-158","description":"CWE-158 Improper Neutralization of Null Byte or NUL Character","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["x_refsource_CONFIRM"],"url":"https://www.facebook.com/security/advisories/cve-2026-23863"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/cna/references/0
{"tags":["x_refsource_CONFIRM"],"url":"https://www.whatsapp.com/security/advisories/2026"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7090f7c6e073bd84f90fd3997c0621fd14c4d94026c30843846ab990f27eea72 · sha256:e59d3d07ca76d5e9… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer