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No exploitation reportedAwaiting NVD analysis

CVE-2026-104657

Missing Integrity Verification in Progress Software Fiddler Download & Setup Skill

No exploitation reported by the sources we read.

  • Published2026-11-06
  • WeaknessCWE-377 · CWE-494

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-0616:33CVE publishedCNA

Versions per branch

Products declared by the CNA

As ProgressSoftware, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Progress Software Fiddler Download & Setup Skillother versions: not affected
    Affected
    • < 8.3.0fixed in 8.3.0semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-06

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-104657 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-11-06
  • CNACVSS 3.17.52026-11-06
  • CNAweakness (CWE)CWE-377, CWE-4942026-11-06
  • NVDweakness (CWE)CWE-377, CWE-494read 2026-11-06

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-11-06
Last Modified
2026-11-06
NVD status
Received

Frequently asked questions

What is CVE-2026-104657?

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.

Is CVE-2026-104657 actively exploited?

Active exploitation of CVE-2026-104657 has not been confirmed.

What is the CVSS score for CVE-2026-104657?

CVE-2026-104657 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

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