{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123975", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-06T17:54:13.735Z", "datePublished": "2026-11-13T15:01:44.332Z", "dateUpdated": "2026-11-13T15:01:44.332Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-13T15:01:44.332Z"}, "datePublic": "2026-11-11T00:00:00.000Z", "title": "Grid Community Toolkit globus-gss-assist before 12.9 Pre-Authentication Heap Out-of-Bounds Write", "descriptions": [{"lang": "en", "value": "Grid Community Toolkit before 6.2.20261111 (globus-gss-assist before 12.9) contains a heap out-of-bounds write in globus_gss_assist_token_get_fd() triggered by SSLv2 record lengths below 3. Remote unauthenticated clients can send a crafted GSI handshake record to services like globus-gatekeeper and myproxy to corrupt heap memory and crash the service."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Out-of-bounds Write", "cweId": "CWE-787", "type": "CWE"}]}], "affected": [{"vendor": "Grid Community Forum", "product": "Grid Community Toolkit", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "custom", "lessThan": "6.2.20261111"}], "packageURL": "pkg:github/gridcf/gct", "repo": "https://github.com/gridcf/gct"}, {"vendor": "Grid Community Forum", "product": "globus-gss-assist", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "custom", "lessThan": "12.9"}], "packageURL": "pkg:github/gridcf/gct", "repo": "https://github.com/gridcf/gct"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "references": [{"url": "https://gridcf.org/#2026-11-11", "tags": ["vendor-advisory"]}, {"url": "https://github.com/gridcf/gct/commit/3df2be4834c146bdcec90009a0f2e5771ff63cca", "tags": ["patch"]}, {"url": "https://github.com/gridcf/gct/releases/tag/v6.2.20261111", "tags": ["release-notes"], "name": "Grid Community Toolkit v6.2.20261111 Release Notes"}, {"url": "https://github.com/gridcf/gct/blob/v6.2.20190829/gsi/gss_assist/source/tokens_f.c", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: Grid Community Toolkit globus-gss-assist before 12.9 Pre-Authentication Heap Out-of-Bounds Write", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/grid-community-toolkit-globus-gss-assist-before-12.9-pre-authentication-heap-out-of-bounds-write"}], "credits": [{"lang": "en", "value": "Deus Rex", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:github/gridcf/gct", "product": "Grid Community Toolkit", "repo": "https://github.com/gridcf/gct", "vendor": "Grid Community Forum", "versions": [{"lessThan": "6.2.20261111", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "packageURL": "pkg:github/gridcf/gct", "product": "globus-gss-assist", "repo": "https://github.com/gridcf/gct", "vendor": "Grid Community Forum", "versions": [{"lessThan": "12.9", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Grid Community Toolkit before 6.2.20261111 (globus-gss-assist before 12.9) contains a heap out-of-bounds write in globus_gss_assist_token_get_fd() triggered by SSLv2 record lengths below 3. Remote unauthenticated clients can send a crafted GSI handshake record to services like globus-gatekeeper and myproxy to corrupt heap memory and crash the service."}], "id": "CVE-2026-123975", "lastModified": "2026-11-13T15:17:34.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "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:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-11-13T15:17:34.120", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/gridcf/gct/blob/v6.2.20190829/gsi/gss_assist/source/tokens_f.c"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/gridcf/gct/commit/3df2be4834c146bdcec90009a0f2e5771ff63cca"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/gridcf/gct/releases/tag/v6.2.20261111"}, {"source": "disclosure@vulncheck.com", "url": "https://gridcf.org/#2026-11-11"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/grid-community-toolkit-globus-gss-assist-before-12.9-pre-authentication-heap-out-of-bounds-write"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

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