CVE-2026-1229

CRITICAL
2026-02-24 [email protected] GHSA-q9hv-hpm4-hj6x
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 24, 2026 - 08:16 nvd
CRITICAL 9.8

Tags

Github Circl Suse

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 .

Analysis

Incorrect computation in CIRCL cryptographic library's CombinedMult function for secp384r1 (P-384) curve. Produces wrong elliptic curve multiplication results for specific inputs, potentially breaking ECDSA signature verification.

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Remediation

Within 24 hours: Inventory all applications and systems using CIRCL ecc/p384 package and assess exposure scope; notify security teams and relevant business units. Within 7 days: Implement network segmentation and access controls around affected systems; engage vendor for patch ETA and interim guidance; evaluate alternative cryptographic libraries for migration feasibility. …

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Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +49
POC: 0

Vendor Status

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CVE-2026-1229 vulnerability details – vuln.today
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