{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48840", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-05-25T17:51:46.146Z", "datePublished": "2026-05-30T01:50:42.637Z", "dateUpdated": "2026-06-05T09:07:37.892Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Exim", "repo": "https://code.exim/org/exim/exim", "vendor": "Exim", "versions": [{"lessThan": "4.99.4", "status": "affected", "version": "4.88", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-839", "description": "CWE-839 Numeric Range Comparison Without Minimum Check", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-05-30T01:50:42.637Z"}, "references": [{"url": "https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1"}, {"url": "https://www.openwall.com/lists/oss-security/2026/05/29/3"}], "tags": ["x_open-source"], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.88", "versionEndExcluding": "4.99.4"}]}]}]}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/29/3"}, {"url": "https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-06-05T09:07:37.892Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-01T12:51:07.836512Z", "id": "CVE-2026-48840", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-06-01T12:51:18.705Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/29/3"}, {"url": "https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-06-05T09:07:37.892Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-48840", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-01T12:51:07.836512Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-01T12:51:14.932Z"}}], "cna": {"tags": ["x_open-source"], "metrics": [{"format": "CVSS", "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:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://code.exim/org/exim/exim", "vendor": "Exim", "product": "Exim", "versions": [{"status": "affected", "version": "4.88", "lessThan": "4.99.4", "versionType": "custom"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1"}, {"url": "https://www.openwall.com/lists/oss-security/2026/05/29/3"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "descriptions": [{"lang": "en", "value": "Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-839", "description": "CWE-839 Numeric Range Comparison Without Minimum Check"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.99.4", "versionStartIncluding": "4.88"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-05-30T01:50:42.637Z"}}}, "cveMetadata": {"cveId": "CVE-2026-48840", "state": "PUBLISHED", "dateUpdated": "2026-06-05T09:07:37.892Z", "dateReserved": "2026-05-25T17:51:46.146Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2026-05-30T01:50:42.637Z", "assignerShortName": "mitre"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "matchCriteriaId": "6B0C501F-93D6-45CB-9F65-F69194F70E05", "versionEndExcluding": "4.99.4", "versionStartIncluding": "4.88", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client."}], "id": "CVE-2026-48840", "lastModified": "2026-06-05T11:16:36.677", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-05-30T02:16:19.790", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2026/05/29/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/05/29/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-839"}], "source": "cve@mitre.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.88,4.99.4)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Exim", "source": "cna", "vendor": "Exim"}, "product": "exim", "vendor": "exim"}], "created": "2026-05-30T03:30:14.144914+00:00", "title": "Exim Proxy Misconfiguration Causes Uninitialized Memory Disclosure", "updated": "2026-05-30T04:00:09.350425+00:00", "vendors": ["exim", "exim$PRODUCT$exim"]}