CVE-2026-111126
catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
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.
- Record
CVE-2026-111126- CVSS 4.0
- 6.9 Medium
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 - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-102357
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.
- Record
EUVD-2026-102357- CVSS 4.0
- 6.9 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gc5h-x8q8-5m4r
catdoc through 0.95 contains an out-of-bounds read vulnerability in the MULRK record handler of...
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.
- Record
GHSA-gc5h-x8q8-5m4r- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-111126- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
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.
- Record
CVE-2026-111126- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-111126
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.
- Record
DEBIAN-CVE-2026-111126- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-111126
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.
- Record
UBUNTU-CVE-2026-111126- CVSS 4.0
- 6.9 Medium
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 - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
catdocDebian:12 |
All versions, plus listed versions 1:0.95-51:0.95-61:0.95-6~deb12u1 |
None known |
catdocDebian:13 |
All versions, plus listed versions 1:0.95-6 |
None known |
catdocDebian:14 |
All versions, plus listed versions 1:0.95-6 |
None known |
catdocUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 0.94.4-1.11:0.94.3~git20151007.fd634c2+dfsg-21:0.94.3~git20151007.fd634c2+dfsg-31:0.94.3~git20160113.dbc9ec6+dfsg-11:0.94.3~git20160113.dbc9ec6+dfsg-1+deb9u1build0.16.04.11:0.94.3~git20160113.dbc9ec6+dfsg-1+deb9u1ubuntu0.1~esm1 |
None known |
catdocUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 1:0.95-31:0.95-4.11:0.95-4.1ubuntu0.18.04.1~esm1 |
None known |
catdocUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 1:0.95-4.11:0.95-4.1ubuntu0.20.04.1~esm1 |
None known |
catdocUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 1:0.95-4.11:0.95-4.21:0.95-51:0.95-5ubuntu0.22.04.1~esm1 |
None known |
catdocUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 1:0.95-51:0.95-5build11:0.95-5ubuntu0.24.04.1~esm1 |
None known |
catdocUbuntu:26.10 |
All versions, plus listed versions 1:0.95-6build1 |
None known |
catdocUbuntu:26.04:LTS |
All versions, plus listed versions 1:0.95-61:0.95-6build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-111126 is a medium vulnerability (CVSS 6.9) in Catdoc, published October 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. No source names a fixed version.
References
hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read
github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c
vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-in-xls2csv-mulrk-record-handler
nvd.nist.gov/vuln/detail/CVE-2026-111126