CVE-2025-8556

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.

CVSS v3.1 Score

3.7

LOW

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

Weakness Type (CWE)

CWE-1287 CWE-1287

References

Other References

https://access.redhat.com/security/cve/CVE-2025-8556 https://bugzilla.redhat.com/show_bug.cgi?id=2371624 https://github.com/cloudflare/circl https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm https://github.com/cloudflare/circl/tree/v1.6.1 https://news.ycombinator.com/item?id=45669593 https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation

Frequently Asked Questions

What is CVE-2025-8556? +

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. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2025-8556? +

CVE-2025-8556 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

How do I check if I'm vulnerable to CVE-2025-8556? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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