PyQuorum: Timing side‑channel in mul_mod_CVE-2026-44368

6.9 / 10

MEDIUM

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

Description

PyQuorum is a cryptographic library for secret sharing and key management. Prior to 0.2.1, 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. This vulnerability is fixed in 0.2.1.

Basic Information

ID CVE-2026-44368

Source GitHub_M

Published May 13, 2026 at 20:18

Affected Product

Vendor svvqt

Product pyquorum

Version < 0.2.1

Affected Versions svvqt pyquorum < 0.2.1

CWE Classification

CWE-208

References

github.com /svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q

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    "published": "2026-05-13T20:18:12.910Z",
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