CVE-2026-107218

{"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": "2026-10-07T22:05:36.155Z"}, "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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-07T22:03:39.825103Z", "id": "CVE-2026-107218", "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": "2026-10-07T22:05:36.155Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-107218", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-07T22:03:39.825103Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-07T22:03:47.687Z"}}], "cna": {"title": "Excelize: RIGHT() on supplementary-plane text slices with a negative index and panics", "source": {"advisory": "GHSA-8jjq-8j9w-m2v6", "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": "qax-os", "product": "excelize", "versions": [{"status": "affected", "version": ">= 2.10.1, <= 2.11.0"}]}], "references": [{"url": "https://github.com/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6", "name": "https://github.com/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/qax-os/excelize/pull/2390", "name": "https://github.com/qax-os/excelize/pull/2390", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396", "name": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-129", "description": "CWE-129: Improper Validation of Array Index"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-07T18:29:38.606Z"}}}, "cveMetadata": {"cveId": "CVE-2026-107218", "state": "PUBLISHED", "dateUpdated": "2026-10-07T22:05:36.155Z", "dateReserved": "2026-10-07T14:34:14.816Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-07T18:29:38.606Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "excelize", "vendor": "qax-os", "versions": [{"status": "affected", "version": ">= 2.10.1, <= 2.11.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*", "matchCriteriaId": "94175A32-9835-4E61-B850-3CF995A3A909", "versionEndIncluding": "2.11.0", "versionStartIncluding": "2.10.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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": "2026-10-13T14:23:29.317", "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-2026-107218", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-07T22:03:39.825103Z", "version": "2.0.3"}}]}, "published": "2026-10-07T19:17:34.120", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/qax-os/excelize/pull/2390"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.10.1,2.11.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "excelize", "source": "cna", "vendor": "qax-os"}, "product": "excelize", "vendor": "qax-os"}], "created": "2026-10-07T20:00:12.527341+00:00", "updated": "2026-10-07T20:00:12.856307+00:00", "vendors": ["qax-os", "qax-os$PRODUCT$excelize"]}