CVE-2026-111127
MediumCVSS 6.1Summary
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.
Risk Assessment
Processing a malicious .xls file can disclose process memory contents or crash the process. This affects systems converting spreadsheets from untrusted sources.
Recommendation
Update catdoc to a version newer than 0.95 once a fix is released and avoid processing untrusted .xls files.
Other vulnerabilities in catdoc
See all- CVE-2026-111126Medium
catdoc through 0.95 contains an out-of-bounds read vulnerability in the MULRK record handler of process_item() in src/xlsparse.c that allows attackers to read past the static rec buffer via a crafted end column. Attackers can supply a crafted .xls workbook or BIFF stream with a large endcol to xls2csv to disclose adjacent process memory as CSV cells or crash the process.
- CVE-2017-11110High
The ole_init function in ole.c in catdoc 0.95 allows remote attackers to cause a denial of service (heap-based buffer underflow and application crash) or possibly have unspecified other impact via a crafted file.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS