CVE-2026-87733
Medium
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.
SeverityMedium
CVSS6.2
Exploit probability—
ProductOcaml Mirage-crypto-ec
PublishedSep 9, 2026
First seenSep 9, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- OCaml mirage-crypto-ec2.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| OCaml mirage-crypto-ec | v < 2.2.0 | 2.2.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.