CVE-2026-44368 Details
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.
A timing side-channel vulnerability has been identified in PyQuorum, a cryptographic library for secret sharing and key management, in versions prior to 0.2.1. The issue arises in the mul_mod function, which performs multiplication using a binary expansion loop. The execution time of this loop varies based on the Hamming weight of the exponent, creating a timing side-channel. An attacker who can measure the duration of secret-sharing operations, potentially through a remote service, could gradually recover the values of shares, leading to the reconstruction of the secret.
Users can upgrade to PyQuorum version 0.2.1 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 13, 2026CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-208 | Observable Timing Discrepancy | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| PyQuorum | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | New CVE Received | [email protected] |