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CVE-2026-120435— Netpbm before 10.86.51, 11.02.30, and 11.15.08 Heap Overflow in xpmtoppm

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.

在以下版本的 Netpbm 中存在一个堆缓冲区溢出漏洞：10.86.51 之前的版本、11.x 系列中 11.02.30 之前的版本，以及 11.03 系列中 11.15.08 之前的版本。该漏洞位于组件中，是由于未对 XPM 文件头中的“每像素字符数”（characters-per-pixel）值进行验证所致。攻击者可构造一个 XPM 文件，使其“每像素字符数”大于 3，从而溢出固定为 3 字节的 colorName 哈希表项，导致程序崩溃，甚至可能引发任意代码执行。

CVSS 7.8 · High Updated Nov 02, 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 Heap Overflow in xpmtoppm

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 heap buffer overflow in xpmtoppm caused by an unvalidated characters-per-pixel value in the XPM header. Attackers can supply a crafted XPM file with characters-per-pixel greater than 3 to overrun fixed 3-byte colorName hash entries, 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

跨界内存写

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-2026-120435

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120435

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Other References for CVE-2026-120435 (6)

https://svn.code.sf.net/p/netpbm/code/!svn/bc/5371/super_stable/doc/HISTORY release-notes
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/5335/trunk/converter/ppm/xpmtoppm.c technical-description
https://sourceforge.net/p/netpbm/code/5336/ patch
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-heap-overflow-in-xpmtoppm third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120435

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

CVE-2026-120433	7.8 HIGH	Netpbm before 10.86.51, 11.02.30, and 11.15.08 picttoppm Stack Buffer Overflow via paintPo
CVE-2026-120436	7.8 HIGH	Netpbm before 10.86.51, 11.02.30, and 11.15.08 Heap Overflow via jbigtopnm
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-787