CVE-2026-44368
pyquorum: Timing side‑channel in mul_mod
EPSS 0.09%
Description
### 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
How to fix CVE-2026-44368
To remediate CVE-2026-44368, upgrade the affected package to a fixed version below.
- PyPI/pyquorum—upgrade to 0.2.1 or later
Is CVE-2026-44368 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.2.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |