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Vulnerability · Published Nov 2, 2026 · Assigned by VulnCheck

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

High 7.8

In plain English

A high-severity out-of-bounds write 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 reportsnot in CISA KEV
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 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12netpbm-freeno fix listedDEBIAN-CVE-2026-120435
Debian:13netpbm-freeno fix listedDEBIAN-CVE-2026-120435
Debian:14netpbm-freeno fix listedDEBIAN-CVE-2026-120435
Ubuntu:22.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120435
Ubuntu:24.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120435
Ubuntu:26.04:LTSnetpbm-freeno fix listedUBUNTU-CVE-2026-120435
Ubuntu:26.10netpbm-freeno fix listedUBUNTU-CVE-2026-120435

Affected products (as reported)

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

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References