CVE-2026-55619

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55619", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T23:31:22.446Z", "datePublished": "2026-08-25T18:24:29.921Z", "dateUpdated": "2026-08-25T19:20:15.362Z"}, "containers": {"cna": {"title": "eml_parser: Parser DoS via deeply nested parentheses in e-mail headers", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1124", "lang": "en", "description": "CWE-1124: Excessively Deep Nesting", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/GOVCERT-LU/eml_parser/security/advisories/GHSA-m66c-fw79-6359", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/GOVCERT-LU/eml_parser/security/advisories/GHSA-m66c-fw79-6359"}, {"name": "https://github.com/GOVCERT-LU/eml_parser/pull/90", "tags": ["x_refsource_MISC"], "url": "https://github.com/GOVCERT-LU/eml_parser/pull/90"}, {"name": "https://github.com/GOVCERT-LU/eml_parser/commit/746a69f86443eb0b6a47f77db3cfe727c21f92b3", "tags": ["x_refsource_MISC"], "url": "https://github.com/GOVCERT-LU/eml_parser/commit/746a69f86443eb0b6a47f77db3cfe727c21f92b3"}, {"name": "https://github.com/GOVCERT-LU/eml_parser/releases/tag/v3.0.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/GOVCERT-LU/eml_parser/releases/tag/v3.0.2"}], "affected": [{"vendor": "GOVCERT-LU", "product": "eml_parser", "versions": [{"version": "< 3.0.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-25T18:24:29.921Z"}, "descriptions": [{"lang": "en", "value": "eml_parser serves as a python module for parsing eml files and returning various information found in the e-mail as well as computed information. Prior to 3.0.2, eml_parser.parser.HeaderParser.header_fetch_parse in eml_parser/parser.py uses email.utils.getaddresses() to parse address-bearing e-mail headers. A deeply nested CFWS comment construct exhausts the standard-library recursive descent parser's call stack and raises RecursionError, which is not caught and therefore aborts parsing of the entire message. An attacker can disrupt SOC pipelines that process untrusted EML files, although callers already need to handle exceptions from malformed or pathological messages. This issue is fixed in version 3.0.2."}], "source": {"advisory": "GHSA-m66c-fw79-6359", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-25T19:18:55.505319Z", "id": "CVE-2026-55619", "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": "2026-08-25T19:20:15.362Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-55619", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-25T19:18:55.505319Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-25T19:19:02.650Z"}}], "cna": {"title": "eml_parser: Parser DoS via deeply nested parentheses in e-mail headers", "source": {"advisory": "GHSA-m66c-fw79-6359", "discovery": "UNKNOWN"}, "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"}}], "affected": [{"vendor": "GOVCERT-LU", "product": "eml_parser", "versions": [{"status": "affected", "version": "< 3.0.2"}]}], "references": [{"url": "https://github.com/GOVCERT-LU/eml_parser/security/advisories/GHSA-m66c-fw79-6359", "name": "https://github.com/GOVCERT-LU/eml_parser/security/advisories/GHSA-m66c-fw79-6359", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/GOVCERT-LU/eml_parser/pull/90", "name": "https://github.com/GOVCERT-LU/eml_parser/pull/90", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/GOVCERT-LU/eml_parser/commit/746a69f86443eb0b6a47f77db3cfe727c21f92b3", "name": "https://github.com/GOVCERT-LU/eml_parser/commit/746a69f86443eb0b6a47f77db3cfe727c21f92b3", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/GOVCERT-LU/eml_parser/releases/tag/v3.0.2", "name": "https://github.com/GOVCERT-LU/eml_parser/releases/tag/v3.0.2", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "eml_parser serves as a python module for parsing eml files and returning various information found in the e-mail as well as computed information. Prior to 3.0.2, eml_parser.parser.HeaderParser.header_fetch_parse in eml_parser/parser.py uses email.utils.getaddresses() to parse address-bearing e-mail headers. A deeply nested CFWS comment construct exhausts the standard-library recursive descent parser's call stack and raises RecursionError, which is not caught and therefore aborts parsing of the entire message. An attacker can disrupt SOC pipelines that process untrusted EML files, although callers already need to handle exceptions from malformed or pathological messages. This issue is fixed in version 3.0.2."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-770", "description": "CWE-770: Allocation of Resources Without Limits or Throttling"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1124", "description": "CWE-1124: Excessively Deep Nesting"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-25T18:24:29.921Z"}}}, "cveMetadata": {"cveId": "CVE-2026-55619", "state": "PUBLISHED", "dateUpdated": "2026-08-25T19:20:15.362Z", "dateReserved": "2026-06-16T23:31:22.446Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-08-25T18:24:29.921Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "eml_parser", "vendor": "GOVCERT-LU", "versions": [{"status": "affected", "version": "< 3.0.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "eml_parser serves as a python module for parsing eml files and returning various information found in the e-mail as well as computed information. Prior to 3.0.2, eml_parser.parser.HeaderParser.header_fetch_parse in eml_parser/parser.py uses email.utils.getaddresses() to parse address-bearing e-mail headers. A deeply nested CFWS comment construct exhausts the standard-library recursive descent parser's call stack and raises RecursionError, which is not caught and therefore aborts parsing of the entire message. An attacker can disrupt SOC pipelines that process untrusted EML files, although callers already need to handle exceptions from malformed or pathological messages. This issue is fixed in version 3.0.2."}], "id": "CVE-2026-55619", "lastModified": "2026-09-09T21:07:31.353", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55619", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-25T19:18:55.505319Z", "version": "2.0.3"}}]}, "published": "2026-08-25T19:16:50.477", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/GOVCERT-LU/eml_parser/commit/746a69f86443eb0b6a47f77db3cfe727c21f92b3"}, {"source": "security-advisories@github.com", "url": "https://github.com/GOVCERT-LU/eml_parser/pull/90"}, {"source": "security-advisories@github.com", "url": "https://github.com/GOVCERT-LU/eml_parser/releases/tag/v3.0.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/GOVCERT-LU/eml_parser/security/advisories/GHSA-m66c-fw79-6359"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}, {"lang": "en", "value": "CWE-1124"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.0.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "eml_parser", "source": "cna", "vendor": "GOVCERT-LU"}, "product": "eml_parser", "vendor": "govcert-lu"}], "created": "2026-08-25T19:45:04.472673+00:00", "updated": "2026-08-25T20:15:04.776547+00:00", "vendors": ["govcert-lu", "govcert-lu$PRODUCT$eml_parser"]}