CVE-2026-111126CWE-125

CVE-2026-111126

Medium · published October 15, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
9.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CVSS v4.0
6.9 · 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
EPSS
0.00200 · 9.4th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-10-15T23:17Z
References (5)
https://github.com/vbwagner/catdoc · [email protected]https://github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c#L314-L328 · [email protected]https://hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read · [email protected]https://www.vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-in-xls2csv-mulrk-record-handler · [email protected]https://hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 15 OCT 18:57Z
    catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
    cvelistv5
  • 15 OCT 18:57Z
    catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
    cvelistv5