{"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":"2026-06-25T12:41:18.144Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T12:40:01.913311Z","id":"CVE-2026-12490","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":"2026-06-25T12:41:18.144Z"}}]}}