CVE-2026-107318 @fastify/reply-from - Man-in-the-Middle

@fastify/reply-from < 12.7.0 contains a man-in-the-middle vulnerability caused by rejectUnauthorized being set to false in HTTPS transports, letting on-path attackers impersonate upstream servers and intercept data, exploit requires network attacker position.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Man-in-the-Middle
Impact
Man In The Middle, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
8 October 2026
Updated
15 October 2026
Weakness
CWE-295

Vendor fix

Upgrade to version 12.7.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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