{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39835", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-04-07T18:13:03.529Z", "datePublished": "2026-05-22T02:31:26.982Z", "dateUpdated": "2026-05-22T17:45:10.853Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-05-22T02:31:26.982Z"}, "title": "Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh", "descriptions": [{"lang": "en", "value": "SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil."}], "affected": [{"vendor": "golang.org/x/crypto", "product": "golang.org/x/crypto/ssh", "collectionURL": "https://pkg.go.dev", "packageName": "golang.org/x/crypto/ssh", "versions": [{"version": "0", "lessThan": "0.52.0", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "CertChecker.CheckHostKey"}, {"name": "CertChecker.Authenticate"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-476: NULL Pointer Dereference"}]}], "references": [{"url": "https://go.dev/issue/79563"}, {"url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"}, {"url": "https://go.dev/cl/781660"}, {"url": "https://pkg.go.dev/vuln/GO-2026-5015"}], "credits": [{"lang": "en", "value": "NCC Group Cryptography Services, sponsored by Teleport"}]}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-22T17:44:50.320380Z", "id": "CVE-2026-39835", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-05-22T17:45:10.853Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil."}], "id": "CVE-2026-39835", "lastModified": "2026-05-22T04:16:24.530", "metrics": {}, "published": "2026-05-22T04:16:24.530", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/781660"}, {"source": "security@golang.org", "url": "https://go.dev/issue/79563"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-5015"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.52.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "golang.org/x/crypto/ssh", "source": "cna", "vendor": "golang.org/x/crypto"}, "product": "ssh", "vendor": "golang"}], "created": "2026-05-22T04:30:25.965396+00:00", "updated": "2026-05-22T12:38:11.650574+00:00", "vendors": ["golang", "golang$PRODUCT$ssh"], "weaknesses": ["CWE-476"]}