{"id":"CVE-2026-104657","title":"Missing Integrity Verification in Progress Software Fiddler Download & Setup Skill","summary":"Missing integrity verification in the Progress Software Fiddler Download and Setup Skill on Linux, macOS, and Windows which allows an attacker to compromise or influence a release component and execute attacker-controlled code when a use…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-494","CWE-377"],"vendor":"Progress Software","product":"Fiddler Download & Setup Skill","affected":["fiddler_download_setup_skill < 8.3.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-11-06T17:14:11.732315Z"},"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:47:49.791Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104657","references":[{"url":"https://www.telerik.com/fiddler/fiddler-everywhere/documentation/knowledge-base/kb-security-missing-download-integrity-verification-cve-2026-104657"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T16:57:43.263Z","epss":0.00169,"epssPercentile":0.06341,"slug":"CVE-2026-104657","body":"## Overview\n\nMissing integrity verification in the Progress Software Fiddler Download and Setup Skill on Linux, macOS, and Windows which allows an attacker to compromise or influence a release component and execute attacker-controlled code when a user runs the skill. On macOS, the skill stages the package at a predictable path and installs it with administrator privileges, which may allow code execution with root privileges after user approval. A local process may also replace the staged macOS package while the skill waits for approval.\n\n## Affected\n\n- `fiddler_download_setup_skill < 8.3.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nDo not run the affected skill version. Install Fiddler manually from the official distribution source, verify the downloaded artifact's publisher signature and available checksum, and on macOS use a per-user DMG installation without administrator privileges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}