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CVE-2025-66418

Is CVE-2025-66418 real, exploitable, or a false positive? Here's the community verdict.

signals

public sources

Exploited in wild
Not listed
CISA KEV
Public exploit
None known
Metasploit/EDB/PoC
Base severity
7.5 High
CVSS
Exploitation prob.
0.6%
FIRST EPSS
Weakness
CWE-770
CWE

High CVSS base score, but low real-world exploitation probability (EPSS). Likely less urgent than the score implies.

scanner noise

anonymous, aggregated from real reports · via Denoizr
ScannerFlagged inTurned out noise
Mend1 scan0%

How often this CVE was flagged by each scanner and how much turned out to be noise (false positives), aggregated anonymously from de-noised reports. Higher noise means the alert is more often not a real risk — verify your exposure.

baseline read

auto · not a community verdict

Real, but low real-world risk

A genuine vulnerability on paper, but EPSS shows little real-world exploitation — the base score may overstate urgency. This is not the same as a false positive.

Based on CVSS · FIRST EPSS

Confirm or dispute →

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.

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In your experience, is this finding real and exploitable?

awaiting field verdicts
Real, but not a risk here
Not a real issue

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    Same weakness: CWE-770.