CVE-2026-111126
catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | catdoc |
| Product | catdoc |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected Versions
catdoc / catdoc
0 ≤ 0.95
References
hackmd.io: https://hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read github.com: https://github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c#L314-L328 github.com: https://github.com/vbwagner/catdoc vulncheck.com: https://www.vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-in-xls2csv-mulrk-record-handler
Credits
HaiND from the Post and Telecommunication Institute of Technology