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Back to active CVEs
High · CVSS 7.5CVE-2026-104657

Missing Integrity Verification in Progress Software Fiddler Download & Setup SkillCVE-2026-104657

Answer in brief

CVE-2026-104657 records a High severity (CVSS 7.5) vulnerability in Missing Integrity Verification in Progress Software Fiddler Download & Setup Skill. The current sources do not mark it as known exploited. The current feed maps Progress Software/Fiddler Download & Setup Skill (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Progress Software/Fiddler Download & Setup Skill (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Progress Software/Fiddler Download & Setup Skillgeneric>=0 <8.3.08.3.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Progress Software/Fiddler Download & Setup Skill.
  2. 2Review the reported fix. Source-reported workaround: Do 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.

Evidence timeline and material changes

  1. Published upstream

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referencetelerik.com
Upstream source description

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 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-494, CWE-377
Source
CVE List V5
Source checked
Nov 6, 2026
References
1 linked source
Open source record