CVE-2026-111127mediumCWE-125

CVE-2026-111127: medium-severity vulnerability in catdoc

catdoc through 0.95 Out-of-Bounds Read via xls2csv copy_unicode_string

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.9epss 0.1%
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
catdoc · catdoc
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CVE-2024-52035HIGHCVE-2024-52035EPSS 0.3%CVE-2024-54028HIGHCVE-2024-54028EPSS 0.3%CVE-2026-111126MEDIUMcatdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record HandlerEPSS 0.2%