CVE-2026-120436

Description

Netpbm before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contains an integer overflow in jbigtopnm that causes heap buffer overflow when computing output buffer size. Attackers can supply a crafted multi-plane JBIG file with large header dimensions so jbg_dec_merge_planes() overflows the undersized buffer, causing crashes or potentially code execution.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: HIGH
CVSS score: 8.5 / 10
CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Effective score: 8.5 / 10 HIGH source: CNA overview
CWE(s): CWE-190
Reserved: 2026-11-02
Published: 2026-11-02 14:28 UTC
Last updated: 2026-11-02 17:34 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120436.json
Linked Threat: CVE-2026-120436 — Netpbm before 10.86.51, 11.02.30, and 11.15.08 Heap Overflow via jbigtopnm

Affected products (1)

Vendor	Product	Versions	Platforms
Netpbm	Netpbm	`0` (affected), `11.0` (affected), `11.03` (affected)	—

Vendor references (6)

References embedded in the original CVE record by the assigning CNA.

https://sourceforge.net/p/netpbm/code/5324/ 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/5357/advanced/doc/HISTORY release-notes
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/5323/trunk/converter/other/jbig/jbigtopnm.c technical-description
VulnCheck Advisory: Netpbm before 10.86.51, 11.02.30, and 11.15.08 Heap Overflow via jbigtopnm third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120436.json.

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