CVE-2026-87736 Memory corruption in mirage-crypto-ec
An out-of-bounds read in the mirage-crypto-ec library allows attackers to read memory or cause crashes when processing compressed EC public keys.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-87736?
CVE-2026-87736 is a medium-severity memory corruption vulnerability in OCaml mirage-crypto-ec, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in the mirage-crypto-ec package before 2.3.0 for OCaml. There is an EC public key out-of-bounds read for compressed points.
Weakness: CWE-125
Which versions are affected by CVE-2026-87736?
How do I fix CVE-2026-87736?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-87736 being exploited?
There is no known exploitation of CVE-2026-87736 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-87736, GHSA-x37h-cx7x-wm76, OSEC-2026-15, UBUNTU-CVE-2026-87736.