# CVE-2026-120432: Netpbm integer overflow in winicontopam

Source: https://junglewise.ai/threats/cve-2026-120432-netpbm-before-10-86-51-11-02-30-and-11-15-08-contains-an-integer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-120432 · Severity: high · CVSS 7.8 · Published 2026-11-02

Netpbm is a graphics format conversion tool used to process image files. An integer overflow in its Windows icon converter allows an attacker to supply a crafted icon file with oversized dimensions that causes the tool to corrupt heap memory, leading to crashes or potentially executing arbitrary code.

Technologies: [Netpbm](https://junglewise.ai/threats/technologies/netpbm). Vendors: [Netpbm](https://junglewise.ai/threats/vendors/netpbm).

## Quick answers

**Is CVE-2026-120432 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120432 being exploited in the wild.

**How severe is CVE-2026-120432?** High severity, with a CVSS score of 7.8, published 2 November 2026.

**Which products and versions are affected?** Netpbm before 10.86.51, 11.02.30, and 11.15.08.

**Is there a fix for CVE-2026-120432?** Yes: fixed in Netpbm 10.86.51, 11.02.30, 11.15.08. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-120432 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-120432?** Check whether you run Netpbm at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Netpbm 10.86.51, 11.02.30, 11.15.08

## Technical details

An integer overflow vulnerability exists in winicontopam's handling of ICO/CUR file dimensions. When width or height values exceed 32767, they wrap int16_t loop counters into negative values, causing out-of-bounds heap buffer access. The vulnerability is triggered by parsing a maliciously crafted icon file with no additional preconditions; exploitation may result in denial of service or code execution.

## Affected products

- Netpbm Netpbm before 10.86.51, 11.02.30, and 11.15.08

## Timeline

- 2026-11-02: disclosed
- 2026-09-11: patched: Fix committed to repository

## References

- [https://sourceforge.net/p/netpbm/code/5335/](https://sourceforge.net/p/netpbm/code/5335/)
- [https://svn.code.sf.net/p/netpbm/code/!svn/bc/5334/trunk/converter/other/winicontopam.c](https://svn.code.sf.net/p/netpbm/code/!svn/bc/5334/trunk/converter/other/winicontopam.c)

## Related threats

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