| Name | CVE-2026-87733 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ocaml-mirage-crypto (PTS) | bookworm | 0.10.7-1 | vulnerable |
| trixie | 2.0.0-1 | vulnerable | |
| forky, sid | 2.4.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ocaml-mirage-crypto | source | (unstable) | 2.2.0-1 |
[trixie] - ocaml-mirage-crypto <no-dsa> (Minor issue)
[bookworm] - ocaml-mirage-crypto <postponed> (Minor issue)
https://osv.dev/vulnerability/OSEC-2026-13
Fixed by: https://github.com/mirage/mirage-crypto/commit/ca84f5ee8ede80bd1dd2aa4cd7cc90197752184e (v2.2.0)