Medium, CVSS 6.9PyPIAmendedPublished
pyquorum: Timing side‑channel in mul_mod
CVE-2026-44368 · GHSA-7r92-3jgr-r65q
- Affected
- PyPI pyquorum < 0.2.1
- Fixed in
- 0.2.1· Vendor fix available
- Issue
- Impact The mulmod function implements multiplication via a binary expansion loop whose execution time depends on the Hamming weight of the second operand (the exponent). An attacker who can measure the time of secret‑sharing operations (e.g., via a remote service) could progressively recover the values of shares, ultimately leading to secret reconstruction. Patches https://github.com/svvqt/pyquorum/releases/tag/v0.2.1
Recommended action: Upgrade to 0.2.1 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.