{"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":"2026-03-17T13:22:11.049Z"},"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"}]},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-325","lang":"en","description":"CWE-325 Missing Cryptographic Step"}]}],"references":[{"url":"https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47","tags":["exploit"]},{"url":"https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-17T13:22:02.709429Z","id":"CVE-2026-4258","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-17T13:22:11.049Z"}}]}}