{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4258", "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "state": "PUBLISHED", "assignerShortName": "snyk", "dateReserved": "2026-03-16T10:00:53.239Z", "datePublished": "2026-03-17T05:00:04.199Z", "dateUpdated": "2026-03-17T05:00:04.199Z"}, "containers": {"cna": {"metrics": [{"cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "exploitCodeMaturity": "PROOF_OF_CONCEPT", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P"}, "cvssV4_0": {"version": "4.0", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"}}], "credits": [{"value": "Kr0emer", "lang": "en"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-347", "description": "Improper Verification of Cryptographic Signature", "lang": "en"}]}], "providerMetadata": {"orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "shortName": "snyk", "dateUpdated": "2026-03-17T05:00:04.199Z"}, "descriptions": [{"value": "All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback.", "lang": "en"}], "references": [{"url": "https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617"}, {"url": "https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47"}, {"url": "https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js%23L454-L461"}, {"url": "https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796"}], "affected": [{"product": "sjcl", "versions": [{"version": "0", "lessThan": "*", "status": "affected", "versionType": "semver"}], "vendor": "n/a"}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback."}], "id": "CVE-2026-4258", "lastModified": "2026-03-17T06:16:18.590", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "report@snyk.io", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "report@snyk.io", "type": "Secondary"}]}, "published": "2026-03-17T06:16:18.590", "references": [{"source": "report@snyk.io", "url": "https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47"}, {"source": "report@snyk.io", "url": "https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js%23L454-L461"}, {"source": "report@snyk.io", "url": "https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796"}, {"source": "report@snyk.io", "url": "https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617"}], "sourceIdentifier": "report@snyk.io", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "report@snyk.io", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}]}, "original": {"product": "sjcl", "source": "cna", "vendor": "n/a"}, "product": "sjcl", "vendor": "bitwiseshiftleft"}], "created": "2026-03-17T09:51:55.385084+00:00", "updated": "2026-03-17T09:51:55.385175+00:00", "vendors": ["bitwiseshiftleft", "bitwiseshiftleft$PRODUCT$sjcl"]}