{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64193", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-07-19T10:13:00.756Z", "datePublished": "2026-07-20T17:54:42.087Z", "dateUpdated": "2026-07-21T18:55:09.291Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Net-DNS", "product": "Net::DNS", "programFiles": ["lib/Net/DNS/RR/OPT.pm"], "programRoutines": [{"name": "Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose"}], "repo": "https://www.net-dns.org/svn/net-dns/", "vendor": "NLNETLABS", "versions": [{"lessThanOrEqual": "1.55", "status": "affected", "version": "0", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Steffen Ullrich"}], "descriptions": [{"lang": "en", "value": "Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR.\n\nNet::DNS::RR::OPT::EXTENDED_ERROR::_decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl's eval. There is some escaping done for $ and @, but not for backticks. This can be exploited for command execution if $pkt->edns->option('EXTENDED-ERROR') is called in array context, for example with a payload of {0:`\"<command>\"`} in EXTRA-TEXT."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-95", "description": "CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-07-20T17:54:42.087Z"}, "references": [{"url": "https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56"}, {"tags": ["issue-tracking"], "url": "https://rt.cpan.org/Ticket/Display.html?id=179945"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to version 1.56 or later."}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2026-07-10T00:00:00.000Z", "value": "Issue reported publicly via RT."}, {"lang": "en", "time": "2026-07-10T00:00:00.000Z", "value": "Version 1.55_01 (release candidate for version 1.56) published on CPAN."}, {"lang": "en", "time": "2026-07-18T00:00:00.000Z", "value": "Version 1.56 published on CPAN."}], "title": "Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/07/20/12"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-20T20:30:04.101Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-07-21T18:54:48.456598Z", "id": "CVE-2026-64193", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-21T18:55:09.291Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/07/20/12"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-20T20:30:04.101Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-64193", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-21T18:54:48.456598Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-21T18:55:00.405Z"}}], "cna": {"title": "Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "reporter", "value": "Steffen Ullrich"}], "affected": [{"repo": "https://www.net-dns.org/svn/net-dns/", "vendor": "NLNETLABS", "product": "Net::DNS", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "1.55"}], "packageName": "Net-DNS", "programFiles": ["lib/Net/DNS/RR/OPT.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "programRoutines": [{"name": "Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose"}]}], "timeline": [{"lang": "en", "time": "2026-07-10T00:00:00.000Z", "value": "Issue reported publicly via RT."}, {"lang": "en", "time": "2026-07-10T00:00:00.000Z", "value": "Version 1.55_01 (release candidate for version 1.56) published on CPAN."}, {"lang": "en", "time": "2026-07-18T00:00:00.000Z", "value": "Version 1.56 published on CPAN."}], "solutions": [{"lang": "en", "value": "Upgrade to version 1.56 or later."}], "references": [{"url": "https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56"}, {"url": "https://rt.cpan.org/Ticket/Display.html?id=179945", "tags": ["issue-tracking"]}, {"url": "https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes", "tags": ["release-notes"]}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}, "descriptions": [{"lang": "en", "value": "Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR.\n\nNet::DNS::RR::OPT::EXTENDED_ERROR::_decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl's eval. There is some escaping done for $ and @, but not for backticks. This can be exploited for command execution if $pkt->edns->option('EXTENDED-ERROR') is called in array context, for example with a payload of {0:`\"<command>\"`} in EXTRA-TEXT."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-95", "description": "CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-07-20T17:54:42.087Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64193", "state": "PUBLISHED", "dateUpdated": "2026-07-21T18:55:09.291Z", "dateReserved": "2026-07-19T10:13:00.756Z", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "datePublished": "2026-07-20T17:54:42.087Z", "assignerShortName": "CPANSec"}, "dataVersion": "5.2"}

{}

{"bugzilla": {"description": "Net::DNS: Net::DNS: Arbitrary code execution via EDNS EXTENDED ERROR handling", "id": "2502954", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502954"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-78", "details": ["A flaw was found in Net::DNS. A remote attacker can exploit a vulnerability in the handling of EDNS (Extension Mechanisms for DNS) EXTENDED ERROR options, leading to arbitrary code execution. The affected component processes the `EXTRA-TEXT` field of an EDNS EXTENDED-ERROR option without properly escaping special characters, which allows for command injection. This enables an attacker to execute unauthorized commands on the system."], "name": "CVE-2026-64193", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "perl-Net-DNS", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-20T17:54:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64193\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64193\nhttps://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes\nhttps://rt.cpan.org/Ticket/Display.html?id=179945\nhttps://www.net-dns.org/blog/#release-candidate-for-netdns-1.56"], "threat_severity": "Critical"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.55]"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "Net::DNS", "source": "cna", "vendor": "NLNETLABS"}, "product": "net_dns", "vendor": "nlnet_labs"}], "created": "2026-07-21T20:15:02.599596+00:00", "updated": "2026-07-28T20:15:03.793740+00:00", "vendors": ["nlnet_labs", "nlnet_labs$PRODUCT$net_dns"]}