CVE-2026-111126 catdoc through 0.95 Out-of-Bounds Read in xls2csv MULRK Record Handler
Attackers can disclose adjacent process memory or crash the application by supplying a crafted .xls file to catdoc's xls2csv utility.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-111126?
CVE-2026-111126 is a medium-severity vulnerability in catdoc, published on 15 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-111126?
How do I fix CVE-2026-111126?
No fix has been published for CVE-2026-111126 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111126 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111126 exists.
Sources
Also known as DEBIAN-CVE-2026-111126, GHSA-gc5h-x8q8-5m4r, UBUNTU-CVE-2026-111126.