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No exploitation reportedAwaiting NVD analysis

CVE-2026-104656

Cross-site Scripting in Progress Telerik Fiddler Everywhere

No exploitation reported by the sources we read.

  • Published2026-11-06
  • WeaknessCWE-79

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

Improper neutralization of input in the sessions grid in Progress Telerik Fiddler Everywhere 8.3.0 and earlier allows an attacker to execute backend IPC commands by convincing a user to open a specially crafted SAZ file.

Timeline

dates in UTC
  1. 2026-11-0616:34CVE 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 Progress® Telerik® Fiddler® Everywhereother 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-2026-104656 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 3.17.32026-11-06
  • CNAweakness (CWE)CWE-792026-11-06
  • NVDweakness (CWE)CWE-79read 2026-11-06

Identifiers

Technical details

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

Frequently asked questions

What is CVE-2026-104656?

Improper neutralization of input in the sessions grid in Progress Telerik Fiddler Everywhere 8.3.0 and earlier allows an attacker to execute backend IPC commands by convincing a user to open a specially crafted SAZ file.

Is CVE-2026-104656 actively exploited?

Active exploitation of CVE-2026-104656 has not been confirmed.

What is the CVSS score for CVE-2026-104656?

CVE-2026-104656 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L.

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