---
title: "CVE-2026-120434: Netpbm - Buffer Overflow"
description: "Netpbm < 10.86.51, 11.x < 11.02.30, and 11.03 < 11.15.08 contain a stack-based buffer overflow caused by polygon edges exceeding 5000 points in picttoppm's scanPoly() function, letting attackers crash the converter or execute code remotely, exploit requires crafted PICT file."
url: https://panop.io/threat-heartbeat/CVE-2026-120434/
---

# CVE-2026-120434 Netpbm - Buffer Overflow

Netpbm < 10.86.51, 11.x < 11.02.30, and 11.03 < 11.15.08 contain a stack-based buffer overflow caused by polygon edges exceeding 5000 points in picttoppm's scanPoly() function, letting attackers crash the converter or execute code remotely, exploit requires crafted PICT file.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-120434)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

2 November 2026

Updated

3 November 2026

Weakness

[CWE-121](https://cwe.mitre.org/data/definitions/121.html)

## Vendor fix

Update to version 10.86.51, 11.02.30, 11.15.08 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-120434](https://nvd.nist.gov/vuln/detail/CVE-2026-120434)
- [https://svn.code.sf.net/p/netpbm/code/!svn/bc/5371/super\_stable/doc/HISTORY](https://svn.code.sf.net/p/netpbm/code/!svn/bc/5371/super_stable/doc/HISTORY)
- [https://www.vulncheck.com/advisories/netpbm-before-10.86.51-11.02.30-and-11.15.08-picttoppm-stack-overflow-via-scanpoly](https://www.vulncheck.com/advisories/netpbm-before-10.86.51-11.02.30-and-11.15.08-picttoppm-stack-overflow-via-scanpoly)
- [https://sourceforge.net/p/netpbm/code/5331/](https://sourceforge.net/p/netpbm/code/5331/)
- [https://svn.code.sf.net/p/netpbm/code/!svn/bc/5330/trunk/converter/ppm/picttoppm.c](https://svn.code.sf.net/p/netpbm/code/!svn/bc/5330/trunk/converter/ppm/picttoppm.c)
- [https://svn.code.sf.net/p/netpbm/code/!svn/bc/5357/advanced/doc/HISTORY](https://svn.code.sf.net/p/netpbm/code/!svn/bc/5357/advanced/doc/HISTORY)
- [https://svn.code.sf.net/p/netpbm/code/!svn/bc/5358/stable/doc/HISTORY](https://svn.code.sf.net/p/netpbm/code/!svn/bc/5358/stable/doc/HISTORY)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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