{"id":"CVE-2026-82867","aliases":["EUVD-2026-68402","GHSA-q78q-xrxw-xgx6","GHSA-qq9g-96v4-m3cj"],"status":"published","title":"@pdfme/schemas before 5.5.9 Cross-Site Scripting via Select","description":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema plugin that fails to sanitize option values before interpolating them into HTML via innerHTML. Attackers can supply malicious templates with crafted option values containing HTML and JavaScript to execute arbitrary code in users' browsers.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0031,"percentile":0.24203,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-03-18T16:10:16Z","modified":"2026-10-28T02:30:51Z","fixes":[{"ecosystem":"npm","package":"@pdfme/schemas","fixed_in":["5.5.9"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@pdfme/schemas","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.5.8"},{"fixed":"5.5.9"}]}]},{"source":"osv","ecosystem":"npm","package":"@pdfme/schemas","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.5.9"}]}]}],"products":[{"vendor":"pdfme","product":"schemas"}],"references":[{"url":"https://github.com/pdfme/pdfme/security/advisories/GHSA-qq9g-96v4-m3cj","tags":["vendor-advisory","exploit","advisory","web"]},{"url":"https://www.vulncheck.com/advisories/pdfme-schemas-before-5.5.9-cross-site-scripting-via-select","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82867","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q78q-xrxw-xgx6"},{"url":"https://github.com/advisories/GHSA-qq9g-96v4-m3cj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82867.json","tags":["advisory"]},{"url":"https://github.com/pdfme/pdfme","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-82867","title":"@pdfme/schemas before 5.5.9 Cross-Site Scripting via Select","description":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema plugin that fails to sanitize option values before interpolating them into HTML via innerHTML. Attackers can supply malicious templates with crafted option values containing HTML and JavaScript to execute arbitrary code in users' browsers.","status":"published","published":"2026-08-31T08:46:37.433Z","modified":"2026-10-08T15:25:41.244Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:40:46.161838Z"}],"euvd":[{"id":"EUVD-2026-68402","description":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema plugin that fails to sanitize option values before interpolating them into HTML via innerHTML. Attackers can supply malicious templates with crafted option values containing HTML and JavaScript to execute arbitrary code in users' browsers.","status":"published","published":"2026-08-31T08:46:37Z","modified":"2026-10-08T15:25:41Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:28.564399Z"}],"ghsa":[{"id":"GHSA-q78q-xrxw-xgx6","title":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema...","description":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema plugin that fails to sanitize option values before interpolating them into HTML via innerHTML. Attackers can supply malicious templates with crafted option values containing HTML and JavaScript to execute arbitrary code in users' browsers.","status":"published","published":"2026-08-31T09:30:32Z","modified":"2026-08-31T09:30:39Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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","level":"medium"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:11:10.774419Z"},{"id":"GHSA-qq9g-96v4-m3cj","title":"Cross-Site Scripting (XSS) via Select Schema Option Value Injection in @pdfme/schemas","description":"## Summary\n\nThe Select schema plugin in `@pdfme/schemas` constructs HTML from template-defined option values using unsanitized string interpolation and sets it via `innerHTML`, enabling arbitrary JavaScript execution.\n\n## Details\n\nIn `packages/schemas/src/select/index.ts`, lines 159-164, the Select schema's `ui` renderer builds `\u003coption\u003e` elements by directly interpolating option values from the template into an HTML string:\n\n```typescript\nconst options = Array.isArray(schema.options) ? schema.options : [];\nselectElement.innerHTML = options\n  .map(\n    (option) =\u003e\n      `\u003coption value=\"${option}\" ${option === value ? 'selected' : ''}\u003e${option}\u003c/option\u003e`,\n  )\n  .join('');\n```\n\nThe `option` values come from `schema.options`, which is an array of strings defined in the template JSON. These values are interpolated directly into the HTML string without any escaping of `\u003c`, `\u003e`, `\"`, `\u0026`, or other HTML-special characters. An option value containing `\"\u003e` breaks out of the `value` attribute and allows injection of arbitrary HTML elements and event handlers.\n\n## Proof of Concept\n\nLoading the following template into a pdfme Form or Designer component triggers JavaScript execution:\n\n```json\n{\n  \"basePdf\": { \"width\": 210, \"height\": 297, \"padding\": [20, 20, 20, 20] },\n  \"schemas\": [[\n    {\n      \"name\": \"malicious_select\",\n      \"type\": \"select\",\n      \"content\": \"Normal\",\n      \"options\": [\n        \"Normal\",\n        \"\\\"\u003e\u003c/option\u003e\u003cimg src=x onerror=\\\"alert(document.domain)\\\"\u003e\"\n      ],\n      \"position\": { \"x\": 20, \"y\": 20 },\n      \"width\": 80,\n      \"height\": 10\n    }\n  ]]\n}\n```\n\nThe injected `\u003cimg onerror\u003e` element executes JavaScript because it is parsed as HTML when assigned to `selectElement.innerHTML`.\n\n## Attack Vectors\n\nThe `options` array is defined in the template (not by form-filling end users). The attack requires a malicious template to be loaded, which can happen via:\n1. File upload (e.g., \"Load Template\" functionality in applications)\n2. Shared/imported templates in multi-tenant applications\n3. Templates stored in databases without content sanitization\n4. The `updateTemplate()` API being called with untrusted data\n\nThis vulnerability is triggered in Form mode (for non-readOnly select fields) and Designer mode when the select element is rendered.\n\n## Impact\n\nAn attacker who can supply a malicious template can execute arbitrary JavaScript in the browser of any user who views or interacts with the template. This enables:\n- Session hijacking via cookie/token theft\n- Keylogging of form input data\n- Phishing and page modification\n- Data exfiltration\n\n## Suggested Fix\n\nUse DOM APIs to create option elements safely instead of string interpolation:\n\n```typescript\noptions.forEach((option) =\u003e {\n  const optionEl = document.createElement('option');\n  optionEl.value = option;\n  optionEl.textContent = option;\n  if (option === value) optionEl.selected = true;\n  selectElement.appendChild(optionEl);\n});\n```\n\nAlternatively, HTML-encode option values before interpolation:\n```typescript\nconst escape = (s) =\u003e s.replace(/\u0026/g, '\u0026amp;').replace(/\"/g, '\u0026quot;').replace(/\u003c/g, '\u0026lt;').replace(/\u003e/g, '\u0026gt;');\n```","status":"published","published":"2026-03-18T16:10:16Z","modified":"2026-03-18T16:10:16Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:39:37.554665Z"}],"nvd":[{"id":"CVE-2026-82867","description":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema plugin that fails to sanitize option values before interpolating them into HTML via innerHTML. Attackers can supply malicious templates with crafted option values containing HTML and JavaScript to execute arbitrary code in users' browsers.","status":"published","published":"2026-08-31T09:17:07.41Z","modified":"2026-10-08T16:17:54.003Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:42.691315Z"}],"osv":[{"id":"CVE-2026-82867","title":"@pdfme/schemas before 5.5.9 Cross-Site Scripting via Select","description":"@pdfme/schemas before 5.5.9 contains a cross-site scripting vulnerability in the Select schema plugin that fails to sanitize option values before interpolating them into HTML via innerHTML. Attackers can supply malicious templates with crafted option values containing HTML and JavaScript to execute arbitrary code in users' browsers.","status":"published","published":"2026-08-31T08:46:37.433Z","modified":"2026-10-28T02:30:51.099384667Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:18.482949Z"},{"id":"GHSA-qq9g-96v4-m3cj","title":"Cross-Site Scripting (XSS) via Select Schema Option Value Injection in @pdfme/schemas","description":"## Summary\n\nThe Select schema plugin in `@pdfme/schemas` constructs HTML from template-defined option values using unsanitized string interpolation and sets it via `innerHTML`, enabling arbitrary JavaScript execution.\n\n## Details\n\nIn `packages/schemas/src/select/index.ts`, lines 159-164, the Select schema's `ui` renderer builds `\u003coption\u003e` elements by directly interpolating option values from the template into an HTML string:\n\n```typescript\nconst options = Array.isArray(schema.options) ? schema.options : [];\nselectElement.innerHTML = options\n  .map(\n    (option) =\u003e\n      `\u003coption value=\"${option}\" ${option === value ? 'selected' : ''}\u003e${option}\u003c/option\u003e`,\n  )\n  .join('');\n```\n\nThe `option` values come from `schema.options`, which is an array of strings defined in the template JSON. These values are interpolated directly into the HTML string without any escaping of `\u003c`, `\u003e`, `\"`, `\u0026`, or other HTML-special characters. An option value containing `\"\u003e` breaks out of the `value` attribute and allows injection of arbitrary HTML elements and event handlers.\n\n## Proof of Concept\n\nLoading the following template into a pdfme Form or Designer component triggers JavaScript execution:\n\n```json\n{\n  \"basePdf\": { \"width\": 210, \"height\": 297, \"padding\": [20, 20, 20, 20] },\n  \"schemas\": [[\n    {\n      \"name\": \"malicious_select\",\n      \"type\": \"select\",\n      \"content\": \"Normal\",\n      \"options\": [\n        \"Normal\",\n        \"\\\"\u003e\u003c/option\u003e\u003cimg src=x onerror=\\\"alert(document.domain)\\\"\u003e\"\n      ],\n      \"position\": { \"x\": 20, \"y\": 20 },\n      \"width\": 80,\n      \"height\": 10\n    }\n  ]]\n}\n```\n\nThe injected `\u003cimg onerror\u003e` element executes JavaScript because it is parsed as HTML when assigned to `selectElement.innerHTML`.\n\n## Attack Vectors\n\nThe `options` array is defined in the template (not by form-filling end users). The attack requires a malicious template to be loaded, which can happen via:\n1. File upload (e.g., \"Load Template\" functionality in applications)\n2. Shared/imported templates in multi-tenant applications\n3. Templates stored in databases without content sanitization\n4. The `updateTemplate()` API being called with untrusted data\n\nThis vulnerability is triggered in Form mode (for non-readOnly select fields) and Designer mode when the select element is rendered.\n\n## Impact\n\nAn attacker who can supply a malicious template can execute arbitrary JavaScript in the browser of any user who views or interacts with the template. This enables:\n- Session hijacking via cookie/token theft\n- Keylogging of form input data\n- Phishing and page modification\n- Data exfiltration\n\n## Suggested Fix\n\nUse DOM APIs to create option elements safely instead of string interpolation:\n\n```typescript\noptions.forEach((option) =\u003e {\n  const optionEl = document.createElement('option');\n  optionEl.value = option;\n  optionEl.textContent = option;\n  if (option === value) optionEl.selected = true;\n  selectElement.appendChild(optionEl);\n});\n```\n\nAlternatively, HTML-encode option values before interpolation:\n```typescript\nconst escape = (s) =\u003e s.replace(/\u0026/g, '\u0026amp;').replace(/\"/g, '\u0026quot;').replace(/\u003c/g, '\u0026lt;').replace(/\u003e/g, '\u0026gt;');\n```","status":"published","published":"2026-03-18T16:10:16Z","modified":"2026-09-01T03:55:42.918512208Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:54.760124Z"}]}}