CVE-2026-87737 Information disclosure in mirage-crypto-ec
Attackers can exploit a timing side channel in elliptic-curve scalar multiplication to potentially recover secret keys.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-87737?
CVE-2026-87737 is a medium-severity vulnerability in OCaml mirage-crypto-ec, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in the mirage-crypto-ec package before 2.4.0 for OCaml. There is a timing side channel for NIST elliptic-curve scalar multiplication: the time required for a lookup can depend on a secret.
Weakness: CWE-208
Which versions are affected by CVE-2026-87737?
How do I fix CVE-2026-87737?
Upgrade to a fixed version.
Is CVE-2026-87737 being exploited?
There is no known exploitation of CVE-2026-87737 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-87737, GHSA-qmhp-mcqx-7ppw, OSEC-2026-17, UBUNTU-CVE-2026-87737.