{"id":"MAL-2026-18271","title":"Malicious code in fontus (PyPI)","summary":"Malicious code in fontus (PyPI)","severity":"critical","exploited":true,"vendor":"fontus","product":"fontus","ecosystem":"pip","affected":["fontus"],"published":"2026-10-25","updated":"2026-10-29","sourceUpdated":"2026-10-29T14:45:09.337393094Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2026-18271","references":[{"url":"https://bad-packages.kam193.eu/pypi/package/fontus"},{"url":"https://pypi.org/project/fontus/0.0.2/"},{"url":"https://pypi.org/project/fontus/0.0.1/"},{"url":"https://pypi.org/project/fontus/0.0.3/"}],"tags":["osv","pip","malware"],"ingestedAt":"2026-10-26T12:01:30.293Z","slug":"MAL-2026-18271","body":"## Overview\n\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (bb5b8b4484126f787f9917d91b6815927146a308f64bfb852c57f5d60bf4bfbb)\nAnalysis of fontus 0.0.3 on PyPI did not identify any code paths that exfiltrate installer data, execute attacker-controlled payloads at install or import time, relay caller-supplied data to third-party destinations, distribute live credentials, or establish persistence. No install-time network fetches, no lifecycle shell execution, no reads of credential paths (~/.aws, ~/.ssh, ~/.npmrc, browser profiles), and no obfuscated or dynamic-exec patterns were observed.\n\n## Source: kam193 (2a8fcff0fd4d827c6f174318ee41ea82eb2667c6d65349a01ca2215aa2f4dd5e)\nThe package most likely performs fingerprinting by exfiltrating basic information and available fonts, with no other functionality.\n\n\n---\n\nCategory: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.\n\n\nCampaign: 2026-10-fontus\n\n\nReasons (based on the campaign):\n\n\n - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.\n\n\n## Affected packages\n\n- `fontus`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":52.3,"likelihood":0,"exploitation":18,"ransomware":0},"changes":[]}