Medium severity6.1NVD Advisory· Published Oct 15, 2026

CVE-2026-111127

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Catdoc/Catdocllm-fuzzy
Range: <=0.95

Patches

Vulnerability mechanics

References

github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.cnvd
hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-readnvd
www.vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-via-xls2csv-copy-unicode-stringnvd

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