{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55254", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T16:44:00.625Z", "datePublished": "2026-07-17T19:55:16.728Z", "dateUpdated": "2026-07-20T18:07:31.078Z"}, "containers": {"cna": {"title": "NCalc: Denial of Service via Unbounded and Non-Terminating Factorial Evaluation", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/ncalc/ncalc/security/advisories/GHSA-3w5p-95mh-gq75", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ncalc/ncalc/security/advisories/GHSA-3w5p-95mh-gq75"}, {"name": "https://github.com/ncalc/ncalc/pull/575", "tags": ["x_refsource_MISC"], "url": "https://github.com/ncalc/ncalc/pull/575"}, {"name": "https://github.com/ncalc/ncalc/commit/eeb6155ee1899b1fdf2cda3da35a4f0ca93ffd6a", "tags": ["x_refsource_MISC"], "url": "https://github.com/ncalc/ncalc/commit/eeb6155ee1899b1fdf2cda3da35a4f0ca93ffd6a"}, {"name": "https://github.com/ncalc/ncalc/releases/tag/v6.1.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/ncalc/ncalc/releases/tag/v6.1.1"}], "affected": [{"vendor": "ncalc", "product": "ncalc", "versions": [{"version": "< 6.1.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-17T19:55:16.728Z"}, "descriptions": [{"lang": "en", "value": "NCalc is a fast, lightweight expression evaluator for .NET. Prior to 6.1.1, the factorial operator implementation in src/NCalc.Core/Helpers/MathHelper.cs permits specially crafted expressions with extremely large factorial operands, causing excessive CPU consumption or a non-terminating loop due to integer overflow in the factorial calculation logic when applications evaluate untrusted expressions. This issue is fixed in version 6.1.1."}], "source": {"advisory": "GHSA-3w5p-95mh-gq75", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-20T18:06:03.191078Z", "id": "CVE-2026-55254", "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": "2026-07-20T18:07:31.078Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-55254", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-20T18:06:03.191078Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T18:07:26.821Z"}}], "cna": {"title": "NCalc: Denial of Service via Unbounded and Non-Terminating Factorial Evaluation", "source": {"advisory": "GHSA-3w5p-95mh-gq75", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "ncalc", "product": "ncalc", "versions": [{"status": "affected", "version": "< 6.1.1"}]}], "references": [{"url": "https://github.com/ncalc/ncalc/security/advisories/GHSA-3w5p-95mh-gq75", "name": "https://github.com/ncalc/ncalc/security/advisories/GHSA-3w5p-95mh-gq75", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/ncalc/ncalc/pull/575", "name": "https://github.com/ncalc/ncalc/pull/575", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/ncalc/ncalc/commit/eeb6155ee1899b1fdf2cda3da35a4f0ca93ffd6a", "name": "https://github.com/ncalc/ncalc/commit/eeb6155ee1899b1fdf2cda3da35a4f0ca93ffd6a", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/ncalc/ncalc/releases/tag/v6.1.1", "name": "https://github.com/ncalc/ncalc/releases/tag/v6.1.1", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "NCalc is a fast, lightweight expression evaluator for .NET. Prior to 6.1.1, the factorial operator implementation in src/NCalc.Core/Helpers/MathHelper.cs permits specially crafted expressions with extremely large factorial operands, causing excessive CPU consumption or a non-terminating loop due to integer overflow in the factorial calculation logic when applications evaluate untrusted expressions. This issue is fixed in version 6.1.1."}], "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-190", "description": "CWE-190: Integer Overflow or Wraparound"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-17T19:55:16.728Z"}}}, "cveMetadata": {"cveId": "CVE-2026-55254", "state": "PUBLISHED", "dateUpdated": "2026-07-20T18:07:31.078Z", "dateReserved": "2026-06-16T16:44:00.625Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-17T19:55:16.728Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{}

{}