pyquorum: Timing side‑channel in mul_mod
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
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pyquorum | < 0.2.1 | 0.2.1 |
References
- https://github.com/svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q
- https://nvd.nist.gov/vuln/detail/CVE-2026-44368
- https://github.com/svvqt/pyquorum/commit/1e9ac41dd3c305c13d7a6b7d227bf325be82d730
- https://github.com/svvqt/pyquorum
- https://github.com/svvqt/pyquorum/releases/tag/v0.2.1
- https://pypi.org/project/pyquorum
- https://github.com/advisories/GHSA-7r92-3jgr-r65q
- CVSS vector
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- Weakness (CWE)
CWE-208- Platform
- Python (PyPI)
- Package
pyquorum- Disclosed
- 06.05.2026
- Updated
- 11.10.2026 14:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-3028 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-7r92-3jgr-r65q - CC BY 4.0
Vulnerability history: pyquorum
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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