CVE-2026-87733CWE-295

CVE-2026-87733

Medium · published September 9, 2026

CVSS v3.1
6.2
EPSS
0%
Percentile
3.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.2 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00151 · 3.9th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-09-09T09:18Z
References (2)
https://osv.dev/vulnerability/OSEC-2026-13 · [email protected]https://osv.dev/vulnerability/OSEC-2026-13 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 09 SEP 04:08Z
    An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml
    cvelistv5