Improper Certificate Validation Affecting ocaml-mirage-crypto package, versions <2.2.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-OCAMLMIRAGECRYPTO-19654152
- published9 Sept 2026
- disclosed9 Sept 2026
Introduced: 9 Sep 2026
CVE-2026-87733 (opens in a new tab)How to fix?
Upgrade Debian:unstable ocaml-mirage-crypto to version 2.2.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ocaml-mirage-crypto package and not the ocaml-mirage-crypto package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.