{
  "affected": [
    {
      "affectedData": [
        {
          "product": "excelize",
          "vendor": "qax-os",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.8.1, \u003c= 2.11.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "EC7558E8-0FE7-4960-9946-5E5189D0ADE3",
              "versionEndIncluding": "2.11.0",
              "versionStartIncluding": "2.8.1",
              "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 2.8.1 to 2.11.0, separately parsed pivot-table field indices are used to index the pivot-cache field-name slice without bounds checks. extractPivotTableFields uses getPivotCacheFieldsName output while processing GetPivotTables and trusts the dataField fld attribute as an index. When a crafted workbook supplies a pivot-field count mismatch or an out-of-range dataField fld value before GetPivotTables is called, the unchecked index causes a Go slice-bounds panic that escapes the library, allowing an attacker to crash the process or request worker. No fixed version is available as of this review."
    }
  ],
  "id": "CVE-2026-107211",
  "lastModified": "2026-10-13T14:24:41.017",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "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": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-107211",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-07T19:03:04.540488Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-07T18:17:18.490",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/qax-os/excelize/commit/6258dcebc4e2a2aed985c38a08098dfd908521d1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/qax-os/excelize/pull/2435"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-mx22-3794-2vpv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-129"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/xuri/excelize/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.8.1"
            },
            {
              "fixed": "2.11.1-0.20261003002531-6258dcebc4e2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-107211"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-129"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T17:52:17Z",
    "nvd_published_at": "2026-10-07T18:17:18Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nextractPivotTableFields builds `order := pc.getPivotCacheFieldsName()` from xl/pivotCache/pivotCacheDefinitionN.xml\u0027s \u003ccacheFields\u003e list, then indexes it with values taken from a *separately parsed* xl/pivotTables/pivotTableN.xml part with zero cross-validation: `order[field.Fld]` where `field.Fld` is a raw attacker-controlled `int` from the `\u003cdataField fld=\"N\"\u003e` attribute, and `order[fieldIdx]` where fieldIdx is a loop index over `pt.PivotFields.PivotField` that need not match the cache\u0027s field count. I executed two independent PoCs against the current HEAD: (1) trimmed the pivot cache\u0027s \u003ccacheFields\u003e to count=0 while leaving the pivot table\u0027s 2 pivotFields untouched -\u003e `runtime error: index out of range [0] with length 0` at pivotTable.go:1431; (2) left the 2 cache fields completely intact and only changed one attribute, `fld=\"1\"` -\u003e `fld=\"99999\"`, in xl/pivotTables/pivotTable1.xml -\u003e `runtime error: index out of range [99999] with length 2` at pivotTable.go:1443. Both stack traces confirmed via non-recovered `go test` runs: extractPivotTableFields -\u003e getPivotTable -\u003e GetPivotTables.\n\n### Reachability / who can trigger this\n\nUnauthenticated: any application that opens an untrusted .xlsx containing a pivot table and calls the public `File.GetPivotTables(sheet)` API. excelize has no recover() anywhere, so this crashes the host process (CLI/worker) or surfaces as an unhandled 500 in a request-scoped-recover HTTP service. Deterministic, single small crafted file, no user interaction beyond the service\u0027s normal open-and-read flow.\n\n### Proof of Concept / Reproduction\n\n**Method:**\n1) Verified source at HEAD (commit e81f0500, 2026-09-27, freshly cloned/up to date; `git status` clean except the new PoC files I added): read pivotTable.go:1425-1454 and confirmed verbatim: `order := pc.getPivotCacheFieldsName()` (1428), loop `for fieldIdx, field := range pt.PivotFields.PivotField` indexing `order[fieldIdx]` at axisRow/axisCol/axisPage (1431/1434/1437), and `Data: order[field.Fld]` (1443) inside the `pt.DataFields.DataField` loop -- zero bounds checks anywhere. Confirmed xmlPivotTable.go:271 `Fld int `xml:\"fld,attr\"`` on xlsxDataField (raw attacker-controlled int, no validation) and the sibling Fld field at line 252. Ran `go build ./...` -- compiles clean. Both citations are accurate.\n2) Found the repo already contained an untracked PoC test file from earlier work (pivot_fld_poc_test.go) implementing this exact finding via a byte-level zip-tamper technique (build a legitimate workbook with excelize\u0027s own public AddPivotTable API, then hex-edit one raw XML part inside the saved .xlsx\u0027s zip bytes -- not a hypothetical reimplementation, uses the real unmodified excelize package). Did not just trust it: ran it myself with `go test -run \u0027TestPivotTableDataFieldFldIndexPanic|TestPivotTableDataFieldFldAttributeOutOfRangePanic\u0027 -v .` and observed real PASS output with exact matching panic strings.\n3) For stronger, independent evidence beyond a recover-wrapped test, I wrote my own standalone non-test Go program from scratch, cmd/pivotcrash/main.go (module github.com/xuri/excelize/v2, go1.27.0 toolchain), that imports the real compiled excelize package (no reimplementation) with two subcommands: `gen`/`gen-trim` (attacker: build a legit pivot-table workbook via the public API, then rezip with one XML part tampered -- either dataField fld=\"1\"-\u003efld=\"99999\", or the pivot cache\u0027s \u003ccacheFields count=\"2\"\u003e collapsed to count=\"0\" -- writing the crafted .xlsx to disk) and `run` (victim: a fresh OS process that does exactly what any consumer service does -- `excelize.OpenFile(path)` then `f.GetPivotTables(\"Sheet1\")` -- with zero recover() anywhere in the file or the call chain). Executed as four separate `go run` process invocations: gen, run, gen-trim, run.\n\n**Evidence:**\nTest run (pre-existing PoC file, re-executed by me, both PASS):\n`--- PASS: TestPivotTableDataFieldFldIndexPanic (0.00s)` logging `CONFIRMED: GetPivotTables panicked ... runtime error: index out of range [0] with length 0`\n`--- PASS: TestPivotTableDataFieldFldAttributeOutOfRangePanic (0.00s)` logging `CONFIRMED: GetPivotTables panicked ... runtime error: index out of range [99999] with length 2`\n`ok  github.com/xuri/excelize/v2  0.114s`\n\nStandalone process-crash run #1 (`go run ./cmd/pivotcrash run pivotcrash_malicious.xlsx`, fld=\"99999\" tamper, cache untouched with 2 fields):\n[victim] file opened successfully, workbook parsed with no errors\n[victim] now calling f.GetPivotTables(\"Sheet1\") on the untrusted workbook...\npanic: runtime error: index out of range [99999] with length 2\ngoroutine 1 [running]:\ngithub.com/xuri/excelize/v2.(*File).extractPivotTableFields(...)\n\t.../pivotTable.go:1443 +0xb9b\ngithub.com/xuri/excelize/v2.(*File).getPivotTable(...)\n\t.../pivotTable.go:1379 +0x7f6\ngithub.com/xuri/excelize/v2.(*File).GetPivotTables(...)\n\t.../pivotTable.go:1278 +0x2f7\nmain.runVictim(...) / main.main() -\u003e exit status 2\n\nStandalone process-crash run #2 (`go run ./cmd/pivotcrash run pivotcrash_malicious_trim.xlsx`, cacheFields trimmed to count=0, pivot table\u0027s 2 pivotFields untouched):\npanic: runtime error: index out of range [0] with length 0\ngoroutine 1 [running]:\ngithub.com/xuri/excelize/v2.(*File).extractPivotTableFields(...)\n\t.../pivotTable.go:1431 +0xc15\ngithub.com/xuri/excelize/v2.(*File).getPivotTable(...)\n\t.../pivotTable.go:1379 +0x7f6\ngithub.com/xuri/excelize/v2.(*File).GetPivotTables(...)\n\t.../pivotTable.go:1278 +0x2f7\nmain.runVictim(...) / main.main() -\u003e exit status 2\n\nIn both standalone runs the \"GetPivotTables RETURNED NORMALLY\" print statement that follows the call was never reached -- the OS process itself terminated via an unrecovered Go panic (exit status 2), for a crafted .xlsx that `excelize.OpenFile` accepted without any error. Both stack traces terminate at the exact claimed sink lines (pivotTable.go:1443 and :1431) via the exact claimed call chain (extractPivotTableFields -\u003e getPivotTable -\u003e GetPivotTables). This is a real, unhandled crash of a real process running unmodified excelize code -- not a mock, not a simulated/hypothetical trace.\n\n### Novelty\n\nRan all 5 requested checks in full, plus extra verification. (1) Pulled the complete, paginated GHSA list via gh api (16 advisories, all state=published, no hidden drafts) and grepped full descriptions, not just summaries, for \"pivot\" -- only one incidental, non-overlapping hit (GHSA-wp2g-vpjj-g53r cites pivotTable.go:538 as an AddPivotTable call site for an unrelated formula-recursion stack-overflow bug). (2) Ran ~15 targeted GitHub issue searches (extractPivotTableFields, getPivotCacheFieldsName, GetPivotTables panic, dataField fld, BaseField, ShowValuesAs, \"index out of range\", cacheFields count mismatch, PivotFields panic, DataField, plus a broad \"pivot\" query returning 30 issues/PRs all individually triaged by title) and full-text-read the 5 most plausible (#2161, #1937, #2183, #1954, #1945) -- none match; the closest (#2161) is a nil-pointer bug in a different function/field, detailed above. (3) Checked PRs both by keyword (is:pr pivot = 10, is:pr \"pivotTable.go\" fld = 0, all reviewed; read PR #2168\u0027s full diff) and exhaustively (pulled all 31 currently-open PRs on the repo and reviewed every title) -- none touch pivot field indexing. (4) Ran 5 WebSearch queries combining the mechanism with \"excelize\"/\"pivot table\"/\"CVE\", and independently cross-checked OSV.dev\u0027s API (which mirrors NVD/GHSA/GO vuln DB) -- turned up only the already-ruled-out GHSA-fx5j (shared-string) and GHSA-h69g (row allocation) advisories, and a non-upstream automated \"task\"-tracking repo (windyswe/q\n...[truncated for brevity]\n\nClosest prior art considered: qax-os/excelize issue #2161 + merged PR #2168 (\"This closes #2161, fix panic on read unsupported pivot table cache source types\", merged 2025-07-05). That bug: pivotCacheDefinition.xml\u0027s \u003ccacheSource type=\"external\"/\u003e has no \u003cworksheetSource\u003e child, so pc.CacheSource.WorksheetSource is a nil pointer, and getPivotTable() (then pivotTable.go:875) dereferenced .Sheet/.Ref on it -\u003e nil-pointer-dereference panic, reached via GetPivotTables (then line 803). Fix was an early type-validation error return in getPivotTable, not any bounds check. SAME-FIX TEST: would that fix also close the candidate bug? No. The candidate\u0027s panic is index-out-of-range (not nil-deref) inside a different function, extractPivotTableFields, on a different data structure: `order := pc.getPivotCacheFieldsName()` (length = count of \u003ccacheFields\u003e) indexed by (a) a loop counter over pt.PivotFields.PivotField (a separate, unrelated count from pivotTableN.xml) at lines 1431/1434/1437, and (b) the raw unvalidated int field.\n...[truncated for brevity]\n\n### Independent skeptical review\n\nTried hard to kill this and it holds. Independently re-read current HEAD (e81f05008b3, fetched and diffed against origin/master to confirm it\u0027s current) rather than trusting the report: pivotTable.go:1427-1454 (extractPivotTableFields) has zero bounds checks on order[fieldIdx] (axisRow/Col/Page branches, lines 1431/1434/1437) or order[field.Fld] (line 1443) \u2014 confirmed by direct Read, matching the claim\u0027s line citations exactly. This is a genuine oversight, not a designed invariant: the very next function in the same file, extractPivotTableShowValuesAs (lines 1476, 1486) and extractPivotTableField (line 1508), DO bounds-check structurally identical order/slice indices before using them \u2014 the developers clearly know this pattern needs guarding and simply missed it in extractPivotTableFields. Confirmed xmlPivotTable.go:271 Fld is a bare unchecked `int` XML attribute, and confirmed getPivotTable/pivotCacheReader/pivotTableReader perform no count-vs-actual-length cross-validation between the independently-parsed pivotTable and pivotCache XML parts. Grepped the entire repo for recover() \u2014 zero hits outside the researcher\u0027s own test file, confirming \"no recover anywhere\" is accurate. Re-ran both provided PoCs myself in a throwaway test file against this exact HEAD (go test -run TestPoC_PivotCache -v): both panic exactly as claimed, with byte-identical messages \u2014 \"index out of range [0] with length 0\" (truncated-cache-fields PoC, line 1431) and \"index out of range [99999] with lengt\n...[truncated for brevity]",
  "id": "GHSA-mx22-3794-2vpv",
  "modified": "2026-10-08T17:52:17Z",
  "published": "2026-10-08T17:52:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-mx22-3794-2vpv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107211"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qax-os/excelize/pull/2435"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qax-os/excelize/commit/6258dcebc4e2a2aed985c38a08098dfd908521d1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/qax-os/excelize"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Excelize: Unchecked pivot-cache field index in extractPivotTableFields causes unrecoverable panic"
}