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CVE-2026-111127

6.9 medium SSVC exploitation: none Deferred
NVD · CVE.org

catdoc through 0.95 contains an out-of-bounds read vulnerability in copy_unicode_string() in src/xlsparse.c that allows attackers to read past buffers via an unchecked string character count. Attackers can supply a crafted .xls file declaring 0xFFFF two-byte characters in LABEL, STRING, or SST records to disclose adjacent memory through xls2csv output or crash the process.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. StatusReceived → DeferredNVD modified 2026-10-16 18:25
  2. First seenCVSS 6.9NVD modified 2026-10-15 19:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 4