{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107218", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-07T14:34:14.816Z", "datePublished": "2026-10-07T18:29:38.606Z", "dateUpdated": "2026-10-07T18:29:38.606Z"}, "containers": {"cna": {"title": "Excelize: RIGHT() on supplementary-plane text slices with a negative index and panics", "problemTypes": [{"descriptions": [{"cweId": "CWE-129", "lang": "en", "description": "CWE-129: Improper Validation of Array Index", "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/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6"}, {"name": "https://github.com/qax-os/excelize/pull/2390", "tags": ["x_refsource_MISC"], "url": "https://github.com/qax-os/excelize/pull/2390"}, {"name": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396", "tags": ["x_refsource_MISC"], "url": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396"}], "affected": [{"vendor": "qax-os", "product": "excelize", "versions": [{"version": ">= 2.10.1, <= 2.11.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-07T18:29:38.606Z"}, "descriptions": [{"lang": "en", "value": "Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.10.1 to 2.11.0, RIGHT validates the requested length with UTF-16 code-unit counts but slices a rune array using Unicode code-point counts. RIGHT reaches leftRight through CalcCellValue, where countUTF16String validates one unit but utf8.RuneCountInString supplies the slice index in another. When RIGHT evaluates supplementary-plane text with a requested character count between the rune count and UTF-16 code-unit count, the inconsistent units produce a negative rune-slice index, allowing an attacker to panic during formula evaluation. No fixed version is available as of this review."}], "source": {"advisory": "GHSA-8jjq-8j9w-m2v6", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "excelize", "vendor": "qax-os", "versions": [{"status": "affected", "version": ">= 2.10.1, <= 2.11.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.10.1 to 2.11.0, RIGHT validates the requested length with UTF-16 code-unit counts but slices a rune array using Unicode code-point counts. RIGHT reaches leftRight through CalcCellValue, where countUTF16String validates one unit but utf8.RuneCountInString supplies the slice index in another. When RIGHT evaluates supplementary-plane text with a requested character count between the rune count and UTF-16 code-unit count, the inconsistent units produce a negative rune-slice index, allowing an attacker to panic during formula evaluation. No fixed version is available as of this review."}], "id": "CVE-2026-107218", "lastModified": "2026-10-07T19:17:34.120", "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"}]}, "published": "2026-10-07T19:17:34.120", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396"}, {"source": "security-advisories@github.com", "url": "https://github.com/qax-os/excelize/pull/2390"}, {"source": "security-advisories@github.com", "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}