Description
An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml. The ECDSA functions {P256,P384,P521}.Dsa.pub_of_octets accept 0x00, the encoding of the point at infinity, as a public key. With that public key, signatures can be forged without a private key.
Published: 2026-09-09
Score: 6.2 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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References
Link Providers
https://osv.dev/vulnerability/OSEC-2026-13 cve-icon cve-icon
History

Wed, 09 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Title ECDSA Public Key Point at Infinity Forgery in Mirage‑Crypto‑EC Library

Wed, 09 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
Description An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml. The ECDSA functions {P256,P384,P521}.Dsa.pub_of_octets accept 0x00, the encoding of the point at infinity, as a public key. With that public key, signatures can be forged without a private key.
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-09T04:08:54.652Z

Reserved: 2026-09-09T04:08:54.293Z

Link: CVE-2026-87733

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-09T05:18:20.430

Modified: 2026-09-09T05:18:20.430

Link: CVE-2026-87733

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-09T12:00:08Z

Weaknesses