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Low severityNVD Advisory· Published Feb 24, 2026· Updated Feb 24, 2026

Incorrect calculation in CIRCL secp384r1 CombinedMult

CVE-2026-1229

Description

The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected.

The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/cloudflare/circlGo
< 1.6.31.6.3

Affected products

585

Patches

Vulnerability mechanics

References

5

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