TI-2026-86019 Aliases CVE-2026-104656 GHSA-697r-pc36-hjvx

Cross-site scripting in Progress Telerik Fiddler Everywhere

LOW 33CWE-79Published 2026-11-06 · Updated 2026-11-06

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Progress Telerik Fiddler Everywhere before 8.3.0 is affected. Improper neutralization of input in the sessions grid (CWE-79) lets an attacker execute backend IPC commands. An attacker must convince a user to open a specially crafted SAZ file.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00168 6th percentileScored 2026-11-07

Fix Fixed Progress® Telerik® Fiddler® Everywhere (Progress Software): 8.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Progress	Progress® Telerik® Fiddler® Everywhere	before 8.3.0	8.3.0	Patch available	CNA

Progress® Telerik® Fiddler® Everywhere VendorProgress Affected before 8.3.0 Fixed in 8.3.0 Patch available CNA

Remediation

Upgrade Progress Telerik Fiddler Everywhere to 8.3.0, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fix · CNA Progress® Telerik® Fiddler® Everywhere (Progress Software) Fixed in 8.3.0

Timeline

2026-11-06 Threatist record created from CVE-2026-104656
2026-11-06 CISA SSVC decision points changed
2026-11-06 Priority changed: MEDIUM → LOW
2026-11-06 Alias added: GHSA-697r-pc36-hjvx

References

Advisory 1

https://www.telerik.com/fiddler/fiddler-everywhere/documentation/knowledge-base/kb-security-cross-site-scripting-cve-2026-104656

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Sources

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