{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4541", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-03-21T15:10:27.592Z", "datePublished": "2026-03-22T08:35:03.623Z", "dateUpdated": "2026-03-22T08:35:03.623Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-22T08:35:03.623Z"}, "title": "janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-347", "lang": "en", "description": "Improper Verification of Cryptographic Signature"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-345", "lang": "en", "description": "Insufficient Verification of Data Authenticity"}]}], "affected": [{"vendor": "janmojzis", "product": "tinyssh", "versions": [{"version": "20250501", "status": "affected"}, {"version": "20260301", "status": "unaffected"}], "modules": ["Ed25519 Signature Handler"]}], "descriptions": [{"lang": "en", "value": "A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended. If you want to get best quality of vulnerability data, you may have to visit VulDB."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 2, "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P", "baseSeverity": "LOW"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 2.5, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C", "baseSeverity": "LOW"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 2.5, "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C", "baseSeverity": "LOW"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 1, "vectorString": "AV:L/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C"}}], "timeline": [{"time": "2026-03-01T00:00:00.000Z", "lang": "en", "value": "Countermeasure disclosed"}, {"time": "2026-03-21T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-03-21T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-03-21T16:15:44.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "pythok (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/?id.352358", "name": "VDB-352358 | janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification", "tags": ["vdb-entry"]}, {"url": "https://vuldb.com/?ctiid.352358", "name": "VDB-352358 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.774687", "name": "Submit #774687 | GitHub tinyssh 20250501 Cryptographic Issues", "tags": ["third-party-advisory"]}, {"url": "https://github.com/janmojzis/tinyssh/issues/101", "tags": ["issue-tracking"]}, {"url": "https://github.com/janmojzis/tinyssh/pull/102", "tags": ["issue-tracking", "patch"]}, {"url": "https://github.com/janmojzis/tinyssh/issues/101#issue-3983586116", "tags": ["exploit", "issue-tracking"]}, {"url": "https://github.com/janmojzis/tinyssh/commit/9c87269607e0d7d20174df742accc49c042cff17", "tags": ["patch"]}, {"url": "https://github.com/janmojzis/tinyssh/releases/tag/20260301", "tags": ["patch"]}, {"url": "https://github.com/janmojzis/tinyssh/", "tags": ["product"]}], "tags": ["x_open-source"]}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended. If you want to get best quality of vulnerability data, you may have to visit VulDB."}], "id": "CVE-2026-4541", "lastModified": "2026-03-22T09:15:59.683", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "LOCAL", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 1.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:H/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 1.5, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 2.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.0, "baseSeverity": "LOW", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}]}, "published": "2026-03-22T09:15:59.683", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/janmojzis/tinyssh/"}, {"source": "cna@vuldb.com", "url": "https://github.com/janmojzis/tinyssh/commit/9c87269607e0d7d20174df742accc49c042cff17"}, {"source": "cna@vuldb.com", "url": "https://github.com/janmojzis/tinyssh/issues/101"}, {"source": "cna@vuldb.com", "url": "https://github.com/janmojzis/tinyssh/issues/101#issue-3983586116"}, {"source": "cna@vuldb.com", "url": "https://github.com/janmojzis/tinyssh/pull/102"}, {"source": "cna@vuldb.com", "url": "https://github.com/janmojzis/tinyssh/releases/tag/20260301"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?ctiid.352358"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?id.352358"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?submit.774687"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}, {"lang": "en", "value": "CWE-347"}], "source": "cna@vuldb.com", "type": "Primary"}]}

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