{"id":"CVE-2026-44368","summary":"PyQuorum: Timing side‑channel in mul_mod","details":"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.","aliases":["GHSA-7r92-3jgr-r65q","PYSEC-2026-3028"],"modified":"2026-07-15T01:48:52.542793751Z","published":"2026-05-13T20:18:12.910Z","database_specific":{"cwe_ids":["CWE-208"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44368.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44368.json"},{"type":"ADVISORY","url":"https://github.com/svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44368"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/svvqt/pyquorum","events":[{"introduced":"0"},{"fixed":"fde2aa02ea1f4a66dd42aa6b59a6071335d1e8c3"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"0.2.1"}]}}],"versions":["v0.2.0","v0.1.3","v0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44368.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}