CVE-2026-111126
catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
catdoc catdoc
CVSS
6.9MediumExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 15 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 1
- catdocaffected: all versions through 0.95CVE List
References 4
- vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-in-xls2csv-mulrk-record-handlerAdvisoryvia CVE List
- hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-readExploitvia CVE List
- github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c#L314-L328Referencevia CVE List
- github.com/vbwagner/catdocReferencevia CVE List