{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-27492", "tracking": { "current_release_date": "2026-03-22T18:47:50.082577Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-27492", "initial_release_date": "2026-02-20T21:39:40.837574Z", "revision_history": [ { "date": "2026-02-20T21:39:40.837574Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-02-20T21:39:47.722028Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-02-21T00:20:49.054036Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-02-21T00:20:50.997472Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-02-21T10:38:43.382333Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-02-21T10:38:48.942927Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-02-21T11:24:57.245366Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-02-21T11:24:59.211498Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-02-21T14:14:37.185815Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-21T15:35:14.221772Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-02-22T00:25:27.948063Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (8).| References created (5).| CWES updated (1)." }, { "date": "2026-02-22T00:25:31.541944Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-02-23T22:39:44.220338Z", "number": "13", "summary": "References created (1)." }, { "date": "2026-02-24T00:21:11.159460Z", "number": "14", "summary": "References created (1)." }, { "date": "2026-02-24T15:26:52.421227Z", "number": "15", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-02-24T15:26:54.707120Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-02-24T18:47:42.753561Z", "number": "17", "summary": "Unknown change." }, { "date": "2026-03-20T09:40:53.687936Z", "number": "18", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T09:40:57.553091Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-03-22T18:47:47.862390Z", "number": "20", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| References created (6).| CWES updated (1)." } ], "status": "interim", "version": "20" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<1.5.1", "product": { "name": "vers:unknown/<1.5.1", "product_id": "CSAFPID-5687731", "product_identification_helper": { "cpe": "cpe:2.3:a:lettermint:lettermint:*:*:*:*:*:node.js:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<1.5.1", "product": { "name": "vers:unknown/>=0|<1.5.1", "product_id": "CSAFPID-5655244" } } ], "category": "product_name", "name": "lettermint" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<1.5.1", "product": { "name": "vers:unknown/<1.5.1", "product_id": "CSAFPID-5658290" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.0", "product": { "name": "vers:unknown/v1.0.0", "product_id": "CSAFPID-5661724" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.1", "product": { "name": "vers:unknown/v1.0.1", "product_id": "CSAFPID-5661725" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.0", "product": { "name": "vers:unknown/v1.1.0", "product_id": "CSAFPID-5661726" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.0", "product": { "name": "vers:unknown/v1.2.0", "product_id": "CSAFPID-5661727" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.1", "product": { "name": "vers:unknown/v1.2.1", "product_id": "CSAFPID-5661728" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.0", "product": { "name": "vers:unknown/v1.3.0", "product_id": "CSAFPID-5661729" } }, { "category": "product_version_range", "name": "vers:unknown/v1.4.0", "product": { "name": "vers:unknown/v1.4.0", "product_id": "CSAFPID-5661730" } }, { "category": "product_version_range", "name": "vers:unknown/v1.5.0", "product": { "name": "vers:unknown/v1.5.0", "product_id": "CSAFPID-5661731" } } ], "category": "product_name", "name": "lettermint-node" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.5.1", "product": { "name": "vers:unknown/1.5.1", "product_id": "CSAFPID-5890225" } }, { "category": "product_version_range", "name": "vers:unknown/<1.5.1", "product": { "name": "vers:unknown/<1.5.1", "product_id": "CSAFPID-5890226" } } ], "category": "product_name", "name": "npm/lettermint" } ], "category": "vendor", "name": "lettermint" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-27492", "cwe": { "id": "CWE-488", "name": "Exposure of Data Element to Wrong Session" }, "notes": [ { "category": "description", "text": "### Impact\nEmail properties (such as to, subject, html, text, and attachments) are not reset between sends when a single client instance is reused across multiple .send() calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected.\n\n### Patches\nYes, the issue has been patched. Users should upgrade to v1.5.1 or later.\n\n### Workarounds\nIf upgrading immediately is not possible, instantiate a new client for each send:\n```js\nconst client = new Lettermint({ apiKey: process.env.LETTERMINT_API_KEY });\nawait client.email.to('...').subject('...').html('...').send();\n```\n\nThis ensures no state is carried over between sends.", "title": "github - https://github.com/advisories/GHSA-49pc-8936-wvfp" }, { "category": "description", "text": "### Impact\nEmail properties (such as to, subject, html, text, and attachments) are not reset between sends when a single client instance is reused across multiple .send() calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected.\n\n### Patches\nYes, the issue has been patched. Users should upgrade to v1.5.1 or later.\n\n### Workarounds\nIf upgrading immediately is not possible, instantiate a new client for each send:\n```js\nconst client = new Lettermint({ apiKey: process.env.LETTERMINT_API_KEY });\nawait client.email.to('...').subject('...').html('...').send();\n```\n\nThis ensures no state is carried over between sends.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-49pc-8936-wvfp.json?alt=media" }, { "category": "description", "text": "Lettermint Node.js SDK is the official Node.js SDK for Lettermint. In versions 1.5.0 and below, email properties (such as to, subject, html, text, and attachments) are not reset between sends when a single client instance is reused across multiple .send() calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected. This issue has been fixed in version 1.5.1.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-27492" }, { "category": "description", "text": "Lettermint Node.js SDK is the official Node.js SDK for Lettermint. In versions 1.5.0 and below, email properties (such as to, subject, html, text, and attachments) are not reset between sends when a single client instance is reused across multiple .send() calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected. This issue has been fixed in version 1.5.1.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-27492" }, { "category": "description", "text": "Lettermint Node.js SDK is the official Node.js SDK for Lettermint. In versions 1.5.0 and below, email properties (such as to, subject, html, text, and attachments) are not reset between sends when a single client instance is reused across multiple .send() calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected. This issue has been fixed in version 1.5.1.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27492.json?alt=media" }, { "category": "description", "text": "Email properties (such as to, subject, html, text, and attachments) are not reset between sends when a single client instance is reused across multiple .send() calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected.", "title": "gitlab - https://gitlab.com/api/v4/projects/25847700/repository/files/npm%2Flettermint%2FCVE-2026-27492.yml/raw" }, { "category": "other", "text": "0.00013", "title": "EPSS" }, { "category": "other", "text": "4.4", "title": "NCSC Score" }, { "category": "other", "text": "The value of the most recent EPSS score, There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "fixed": [ "CSAFPID-5890225" ], "known_affected": [ "CSAFPID-5655244", "CSAFPID-5658290", "CSAFPID-5661724", "CSAFPID-5661725", "CSAFPID-5661726", "CSAFPID-5661727", "CSAFPID-5661728", "CSAFPID-5661729", "CSAFPID-5661730", "CSAFPID-5661731", "CSAFPID-5687731", "CSAFPID-5890226" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-49pc-8936-wvfp" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-49pc-8936-wvfp" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-49pc-8936-wvfp.json?alt=media" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27492" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27492.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27492" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27492" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27492" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27492.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - gitlab", "url": "https://gitlab.com/api/v4/projects/25847700/repository/files/npm%2Flettermint%2FCVE-2026-27492.yml/raw" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://github.com/lettermint/lettermint-node/security/advisories/GHSA-49pc-8936-wvfp" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://github.com/lettermint/lettermint-node/commit/24a17acbc2429c5eb30391f9df3dc0ea7aaf4de1" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://github.com/lettermint/lettermint-node/blob/main/CHANGELOG.md#151-2026-02-20" }, { "category": "external", "summary": "Reference - github; gitlab", "url": "https://github.com/advisories/GHSA-49pc-8936-wvfp" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27492.json" }, { "category": "external", "summary": "Reference - github; gitlab; osv", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27492" }, { "category": "external", "summary": "Reference - gitlab", "url": "https://github.com/lettermint/lettermint-node" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 4.7, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5655244", "CSAFPID-5658290", "CSAFPID-5661724", "CSAFPID-5661725", "CSAFPID-5661726", "CSAFPID-5661727", "CSAFPID-5661728", "CSAFPID-5661729", "CSAFPID-5661730", "CSAFPID-5661731", "CSAFPID-5687731", "CSAFPID-5890226" ] } ], "title": "CVE-2026-27492" } ] }