{"id":"CVE-2026-44368","state":"PUBLISHED","title":"PyQuorum: Timing side‑channel in mul_mod","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.","publishedAt":"2026-05-13T20:18:12.910Z","updatedAt":"2026-05-15T18:44:14.203Z","severity":{"score":6.9,"label":"Medium","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["svvqt pyquorum"],"affected":[{"vendor":"svvqt","product":"pyquorum","versions":[{"version":"< 0.2.1","status":"affected"}]}],"references":["https://github.com/svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q"],"weaknesses":["CWE-208"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44368.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44368","state":"PUBLISHED","datePublished":"2026-05-13T20:18:12.910Z","dateUpdated":"2026-05-15T18:44:14.203Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-05T20:15:20.631Z"},"containers":{"cna":{"title":"PyQuorum: Timing side‑channel in mul_mod","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"svvqt","product":"pyquorum","versions":[{"version":"< 0.2.1","status":"affected"}]}],"references":[{"url":"https://github.com/svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q","name":"https://github.com/svvqt/pyquorum/security/advisories/GHSA-7r92-3jgr-r65q","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-208","lang":"en","description":"CWE-208: Observable Timing Discrepancy","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-13T20:18:12.910Z"},"source":{"advisory":"GHSA-7r92-3jgr-r65q","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-15T18:43:46.865680Z","id":"CVE-2026-44368","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-15T18:44:14.203Z"}}]}}}