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GHSA-7r92-3jgr-r65q

pyquorum: Timing side‑channel in mul_mod

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-44368

Packages

EcosystemPackageAffectedFixed in
PyPI pyquorum < 0.2.1 0.2.1

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The `mul_mod` 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

References

External links from the advisory. They lead to third-party sites.