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CVE-2026-120433— Netpbm before 10.86.51, 11.02.30, and 11.15.08 picttoppm Stack Buffer Overflow via paintPoly

Quick assessment

Affected

Netpbm Netpbm

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在版本 10.86.51 之前的 Netpbm、11.x 系列中早于 11.02.30 的版本，以及 11.03 系列中早于 11.15.08 的版本中，由于多边形顶点数量未受限制，picttoppm 工具中的 paintPoly() 函数存在基于栈的缓冲区溢出漏洞。攻击者可构造一个包含超过 100 个顶点的多边形 PICT 文件，从而覆盖固定的 pts 数组，导致程序崩溃或潜在地实现代码执行。

CVSS 7.8 · High Updated Nov 03, 2026

Possible ATT&CK Techniques 2 AI

T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

Vendor	Product	Version Range	Status
Netpbm	Netpbm	`< 10.86.51`	affected
		`11.0< 11.02.30`	affected
		`11.03< 11.15.08`	affected

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Vulnerability Information

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Vulnerability Title

Netpbm before 10.86.51, 11.02.30, and 11.15.08 picttoppm Stack Buffer Overflow via paintPoly

Source: CVE Program / CVE List V5

Vulnerability Description

Netpbm before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contains a stack-based buffer overflow in the picttoppm paintPoly() function due to an unbounded polygon point count. Attackers can supply a crafted PICT file with a polygon exceeding 100 points to overwrite the fixed pts array, causing crashes or potentially code execution.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

栈缓冲区溢出

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Netpbm	Netpbm	0 ~ 10.86.51	-

II. Public POCs for CVE-2026-120433

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120433

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Other References for CVE-2026-120433 (6)

https://svn.code.sf.net/p/netpbm/code/!svn/bc/5371/super_stable/doc/HISTORY release-notes
https://sourceforge.net/p/netpbm/code/5328/ patch
https://svn.code.sf.net/p/netpbm/code/!svn/bc/5358/stable/doc/HISTORY release-notes
https://svn.code.sf.net/p/netpbm/code/!svn/bc/5327/trunk/converter/ppm/picttoppm.c technical-description
https://svn.code.sf.net/p/netpbm/code/!svn/bc/5357/advanced/doc/HISTORY release-notes
https://www.vulncheck.com/advisories/netpbm-before-10.86.51-11.02.30-and-11.15.08-picttoppm-stack-buffer-overflow-via-paintpoly third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120433

Same Patch Batch · Netpbm · 2026-11-02 · 7 CVEs total

CVE-2026-120436	7.8 HIGH	Netpbm before 10.86.51, 11.02.30, and 11.15.08 Heap Overflow via jbigtopnm
CVE-2026-120435	7.8 HIGH	Netpbm before 10.86.51, 11.02.30, and 11.15.08 Heap Overflow in xpmtoppm
CVE-2026-120432	7.8 HIGH	Netpbm before 10.86.51, 11.02.30, and 11.15.08 Integer Overflow in winicontopam
CVE-2026-120431	7.8 HIGH	Netpbm before 10.86.51, 11.02.29, and 11.15.07 sgitopnm Heap Buffer Overflow
CVE-2026-120434	7.8 HIGH	Netpbm before 10.86.51, 11.02.30, and 11.15.08 picttoppm Stack Overflow via scanPoly
CVE-2026-120437	6.1 MEDIUM	Netpbm before 10.86.51, 11.02.30, and 11.15.08 Out-of-Bounds Read via tgatoppm

IV. Related Vulnerabilities

Same product: Netpbm

Same vendor: Netpbm

Same weakness: CWE-121