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CVE-2026-104656VulnerabilityPublished

Progress Telerik Fiddler Everywhere · Improper Neutralization of Input

Source GCVE Database

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Authoritative record:CVE-2026-104656· High 7.3

Not known to be exploited · CVSS 7.3 High : upgrade to 8.3.0 soon.

Data as of 6 Nov 2026, 19:18 UTC

CVSS 3.1 base score
7.3High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ProgressSoftware)CVSS 3.17.3
Patch
Available – fixed in 8.3.0
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade Progress® Telerik® Fiddler® Everywhere to 8.3.0.

Affected software

ProductAffectedFixed in
Progress SoftwareProgress® Telerik® Fiddler® EverywhereAffected
  • <8.3.0
Fixed in
  • 8.3.0

AI-suggested

If you cannot patch yet, users should avoid opening SAZ files from untrusted sources and exercise caution when handling session files.

Description

Progress Telerik Fiddler Everywhere versions 8.3.0 and earlier contain an input neutralization vulnerability in the sessions grid. This flaw allows an attacker to execute backend inter-process communication (IPC) commands by tricking a user into opening a maliciously crafted SAZ file. The vulnerability requires user interaction and local access to the application. It has a high severity rating with a CVSS score of 7.3.

References

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