{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-12490", "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "state": "PUBLISHED", "assignerShortName": "NLnet Labs", "dateReserved": "2026-06-17T06:44:23.686Z", "datePublished": "2026-06-25T05:24:41.814Z", "dateUpdated": "2026-06-25T05:24:41.814Z"}, "containers": {"cna": {"title": "Bypass of client certificate verification with transfer over TLS", "references": [{"tags": ["vendor-advisory"], "url": "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12490.txt"}], "solutions": [{"lang": "en", "value": "This issue is fixed starting with version 4.14.3."}], "affected": [{"defaultStatus": "unaffected", "product": "NSD", "vendor": "NLnet Labs", "versions": [{"version": "4.10.1", "lessThan": "4.14.3", "status": "affected", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Qifan Zhang from Palo Alto Networks"}], "timeline": [{"lang": "en", "time": "2026-06-15T00:00:00.000Z", "value": "Issue reported by Qifan Zhang"}, {"lang": "en", "time": "2026-06-16T00:00:00.000Z", "value": "NLnet Labs shares patch"}, {"lang": "en", "time": "2026-06-17T00:00:00.000Z", "value": "Qifan Zhang verifies patch"}, {"lang": "en", "time": "2026-06-25T00:00:00.000Z", "value": "Fix released with version 4.14.3"}], "datePublic": "2026-06-25T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "When a provide-xfr is given with a tls-auth-name, a secondary requesting a transfer should provide a client certificate with that name. However, no client certificate is needed when the request comes in over TLS over the regular tls-port (and not the tls-auth-port) or over over TCP over the regular port, when the other conditions of the provide-xfr rule match."}], "metrics": [{"scenarios": [{"lang": "en", "value": "Transfer security restrictions for client certificates can be bypassed completely if the attacker can match the other access control conditions, and the tls-auth-xfr-only option is not explicitly set to yes (which it by default is not)"}], "cvssV4_0": {"baseScore": 8.2, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-306", "description": "CWE-306: Missing Authentication for Critical Function", "lang": "en", "type": "CWE"}, {"cweId": "CWE-284", "description": "CWE-284: Improper Access Control", "lang": "en", "type": "CWE"}]}], "x_generator": {"engine": "cvelib 1.8.0"}, "providerMetadata": {"orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "shortName": "NLnet Labs", "dateUpdated": "2026-06-25T05:24:41.814Z"}}}}

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