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CVE-2025-8556

Low

Description

A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.

SeverityLow
CVSS3.7
Exploit probability—
ProductGithub.com/cloudflare/circl
PublishedAug 6, 2025
First seenAug 6, 2025
Weakness typeCWE-1287CWE-1287

How to fix

Update
  • github.com/cloudflare/circl1.6.1 or later

Affected products

ProductAffected versionsFixed in
github.com/cloudflare/circlGov < 1.6.11.6.1

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