{ "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-2026-33332", "tracking": { "current_release_date": "2026-03-29T01:16:58.544931Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33332", "initial_release_date": "2026-03-21T01:08:20.936376Z", "revision_history": [ { "date": "2026-03-21T01:08:20.936376Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-21T01:08:25.073695Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-24T20:53:50.358711Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-24T20:53:52.941321Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-24T20:54:28.593470Z", "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": "2026-03-24T20:54:31.343595Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-25T17:40:28.452930Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-03-25T17:40:31.739539Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-26T00:50:32.102026Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-26T00:50:41.636459Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-03-26T13:25:37.712516Z", "number": "11", "summary": "CVSS created.| Products connected (1).| Product Identifiers created (1)." }, { "date": "2026-03-26T13:25:44.814335Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-03-28T07:58:20.799791Z", "number": "13", "summary": "References created (3).| CWES updated (1)." }, { "date": "2026-03-28T07:58:23.539438Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-03-28T08:11:15.063100Z", "number": "15", "summary": "References removed (3).| CWES updated (1)." }, { "date": "2026-03-29T01:16:45.391098Z", "number": "16", "summary": "References created (3).| CWES updated (1)." } ], "status": "interim", "version": "16" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<3.9.0", "product": { "name": "vers:unknown/<3.9.0", "product_id": "CSAFPID-5902833", "product_identification_helper": { "cpe": "cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "nicegui" } ], "category": "vendor", "name": "zauberzeug" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33332", "cwe": { "id": "CWE-770", "name": "Allocation of Resources Without Limits or Throttling" }, "notes": [ { "category": "description", "text": "## Summary\n\nNiceGUI's `app.add_media_file()` and `app.add_media_files()` media routes accept a user-controlled query parameter that influences how files are read during streaming. The parameter is passed to the range-response implementation without validation, allowing an attacker to bypass chunked streaming and force the server to load entire files into memory at once.\n\nWith large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service.\n\n## Impact\n\n**Affected applications:** NiceGUI applications that serve media content via `app.add_media_file()` or `app.add_media_files()`, particularly those serving large files (video, audio).\n\n**What an attacker can do:**\n- Force the server to load entire files into memory instead of streaming them in chunks\n- Amplify memory usage with concurrent requests to large media files\n- Cause performance degradation, memory pressure, and potential OOM conditions\n\n**Attack difficulty:** Low - requires only a crafted query parameter.\n\n## Remediation\n\nUpgrade to a patched version of NiceGUI.\n\nAs a workaround, restrict access to media endpoints or strip unexpected query parameters at a reverse proxy layer.", "title": "github - https://api.github.com/advisories/GHSA-w5g8-5849-vj76" }, { "category": "description", "text": "NiceGUI is a Python-based UI framework. Prior to version 3.9.0, NiceGUI's app.add_media_file() and app.add_media_files() media routes accept a user-controlled query parameter that influences how files are read during streaming. The parameter is passed to the range-response implementation without validation, allowing an attacker to bypass chunked streaming and force the server to load entire files into memory at once. With large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service. This issue has been patched in version 3.9.0.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33332" }, { "category": "description", "text": "NiceGUI is a Python-based UI framework. Prior to version 3.9.0, NiceGUI's app.add_media_file() and app.add_media_files() media routes accept a user-controlled query parameter that influences how files are read during streaming. The parameter is passed to the range-response implementation without validation, allowing an attacker to bypass chunked streaming and force the server to load entire files into memory at once. With large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service. This issue has been patched in version 3.9.0.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33332.json" }, { "category": "other", "text": "0.00025", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "6.9", "title": "CVSSV4 base score" }, { "category": "other", "text": "4.6", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Nvd, Is related to CWE-770 (Allocation of Resources Without Limits or Throttling)", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "The value of the most recent EPSS score, Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5902833" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-w5g8-5849-vj76" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33332" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33332.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-w5g8-5849-vj76" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-w5g8-5849-vj76" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/zauberzeug/nicegui/commit/9026962b8c4f3f225c98b2fbc35aa6b60cb3495b" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.9.0" }, { "category": "external", "summary": "Reference - github", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33332" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5902833" ] } ], "title": "CVE-2026-33332" } ] }