What’s Vulnerable › Vulnerabilities
CVE-2026-87733
- Severity: medium (CVSS 6.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-09 · updated 2026-09-09
- Weakness: CWE-295
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.
Affected products
- OCaml mirage-crypto-ec: before 2.2.0 — fixed in 2.2.0
How to fix
Upgrade to a fixed version: OCaml mirage-crypto-ec 2.2.0. Check the vendor advisory for mitigations.
References
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