VulnerabilityDeferred

CVE-2026-87733

An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml.

MEDIUM 6.2EPSS 0.10%

Does this matter?

Lower severity and a low EPSS score (0.10%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 6.2 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.10% probability · 1th percentile
CISA KEV: Not listed
Weakness: CWE-295
Source: cve@mitre.org

References

https://osv.dev/vulnerability/OSEC-2026-13
https://osv.dev/vulnerability/OSEC-2026-13

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.