CVE-2026-87733Medium· 6.2▾ TwilightPoC availableAn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 34.1 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 10.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Exploit / PoC code exists
0.1%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-87736Medium· 4.3An issue was discovered in the mirage-crypto-ec package before 2.3.0 for OCaml
CVE-2026-87737Medium· 5.9An issue was discovered in the mirage-crypto-ec package before 2.4.0 for OCaml
CVE-2026-24281High· 7.4Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certifica…
CVE-2026-87734High· 7.5An issue was discovered in the utcp package before 0.0.6 for OCaml
CVE-2026-89086Critical· 9.1In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.
CVE-2026-87732Medium· 6.2An issue was discovered in the mirage-crypto package before 2.2.0 for OCaml