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Vulnerability · Published Nov 2, 2026 · Assigned by VulnCheck

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

High 7.8

In plain English

A high-severity stack buffer overflow in Netpbm from Netpbm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 92.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12netpbm-freeno fix listedDEBIAN-CVE-2026-120433
Debian:13netpbm-freeno fix listedDEBIAN-CVE-2026-120433
Debian:14netpbm-freeno fix listedDEBIAN-CVE-2026-120433
Ubuntu:22.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120433
Ubuntu:24.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120433
Ubuntu:26.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120433
Ubuntu:26.10netpbm-freeno fix listedUBUNTU-CVE-2026-120433

Affected products (as reported)

VendorProductVersions
Netpbm Netpbm 0 – before 10.86.5111.0 – before 11.02.3011.03 – before 11.15.08

Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References