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Vulnerability · Published Nov 2, 2026 · Assigned by VulnCheck

CVE-2026-120434Netpbm before 10.86.51, 11.02.30, and 11.15.08 picttoppm Stack Overflow via scanPoly

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 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 95.9% 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 picttoppm's scanPoly() function in converter/ppm/picttoppm.c. Attackers can supply a crafted PICT file whose polygon edges produce more than 5000 points, overflowing the coord stack array to crash the converter or potentially execute code.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12netpbm-freeno fix listedDEBIAN-CVE-2026-120434
Debian:13netpbm-freeno fix listedDEBIAN-CVE-2026-120434
Debian:14netpbm-freeno fix listedDEBIAN-CVE-2026-120434
Ubuntu:22.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120434
Ubuntu:24.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120434
Ubuntu:26.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120434
Ubuntu:26.10netpbm-freeno fix listedUBUNTU-CVE-2026-120434

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