{ "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-2026-33167", "tracking": { "current_release_date": "2026-03-26T00:45:23.471248Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33167", "initial_release_date": "2026-03-24T20:42:00.903789Z", "revision_history": [ { "date": "2026-03-24T20:42:00.903789Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-24T20:42:07.094764Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-24T20:45:51.897234Z", "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": "2026-03-24T20:45:55.035428Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-24T20:53:50.342173Z", "number": "5", "summary": "Unknown change." }, { "date": "2026-03-24T20:54:17.578380Z", "number": "6", "summary": "Source connected.| CVE status created. (valid)| Products connected (3).| References created (13)." }, { "date": "2026-03-24T20:54:28.106371Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| Product Identifiers created (1).| Product Remediations created (2).| References created (5).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-24T20:54:31.343595Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-24T21:37:54.522208Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-24T21:38:01.526833Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-03-25T01:00:19.522568Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (4).| CWES updated (1)." }, { "date": "2026-03-25T01:00:29.171500Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-03-25T18:40:49.273029Z", "number": "13", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (3).| Product Identifiers created (3).| Products connected (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-25T18:40:57.556475Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-03-25T18:44:54.318443Z", "number": "15", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (2)." }, { "date": "2026-03-25T21:50:00.146891Z", "number": "16", "summary": "CVSS created.| References created (1)." }, { "date": "2026-03-25T21:50:02.766645Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-03-26T00:44:50.906265Z", "number": "18", "summary": "CVSS created.| References created (1)." } ], "status": "interim", "version": "18" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439313", "product_identification_helper": { "cpe": "cpe:/a:redhat:satellite:6" } } } ], "category": "product_name", "name": "Red Hat Satellite 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1439314" } } ], "category": "product_name", "name": "rubygem-actionpack" } ], "category": "product_family", "name": "Red Hat Satellite 6" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<7.2.3.1", "product": { "name": "vers:unknown/<7.2.3.1", "product_id": "CSAFPID-5902821" } }, { "category": "product_version_range", "name": "vers:unknown/<8.0.4.1", "product": { "name": "vers:unknown/<8.0.4.1", "product_id": "CSAFPID-5902822" } }, { "category": "product_version_range", "name": "vers:unknown/<8.1.2.1", "product": { "name": "vers:unknown/<8.1.2.1", "product_id": "CSAFPID-5902823" } } ], "category": "product_name", "name": "Ruby on Rails" } ], "category": "vendor", "name": "Open Source" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/8.1.0", "product": { "name": "vers:unknown/8.1.0", "product_id": "CSAFPID-5908066", "product_identification_helper": { "purl": "pkg:gem/actionpack@8.1.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.1", "product": { "name": "vers:unknown/8.1.1", "product_id": "CSAFPID-5908067", "product_identification_helper": { "purl": "pkg:gem/actionpack@8.1.1" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.2", "product": { "name": "vers:unknown/8.1.2", "product_id": "CSAFPID-5908068", "product_identification_helper": { "purl": "pkg:gem/actionpack@8.1.2" } } }, { "category": "product_version_range", "name": "vers:unknown/>=8.1.0|<8.1.2.1", "product": { "name": "vers:unknown/>=8.1.0|<8.1.2.1", "product_id": "CSAFPID-5902096" } } ], "category": "product_name", "name": "actionpack" } ], "category": "vendor", "name": "rails" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-1403701" } } ], "category": "product_name", "name": "rails" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-1403702" } } ], "category": "product_name", "name": "rails" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33167", "cwe": { "id": "CWE-79", "name": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')" }, "notes": [ { "category": "description", "text": "Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33167" }, { "category": "description", "text": "Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33167.json" }, { "category": "description", "text": "A flaw was found in Action Pack, a component of the Rails framework. A remote attacker could exploit this vulnerability by crafting a malicious exception message. When this message is displayed on the debug exceptions page, the improper escaping of the message allows for the injection of arbitrary HTML and JavaScript, leading to Cross-Site Scripting (XSS). This primarily impacts applications with detailed exception pages enabled, which is the default setting in development environments.", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33167.json" }, { "category": "description", "text": "### Impact\nThe debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development.\n\n### Releases\nThe fixed releases are available at the normal locations.", "title": "github - https://api.github.com/advisories/GHSA-pgm4-439c-5jp6" }, { "category": "description", "text": "### Impact\nThe debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development.\n\n### Releases\nThe fixed releases are available at the normal locations.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/RubyGems%2FGHSA-pgm4-439c-5jp6.json?alt=media" }, { "category": "description", "text": "Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-33167" }, { "category": "other", "text": "0.00015", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/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", "title": "CVSSV4" }, { "category": "other", "text": "1.3", "title": "CVSSV4 base score" }, { "category": "other", "text": "3.8", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to a product by vendor Open Source, Is related to (a version of) an uncommon product, The value of the most recent EPSS score, The value of the most recent CVSS (V3) score, Is related to CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5902096", "CSAFPID-5902821", "CSAFPID-5902822", "CSAFPID-5902823", "CSAFPID-1439313", "CSAFPID-1439314", "CSAFPID-5908066", "CSAFPID-5908067", "CSAFPID-5908068" ], "known_not_affected": [ "CSAFPID-1403701", "CSAFPID-1403702" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33167" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33167.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0833.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33167.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-pgm4-439c-5jp6" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/RubyGems%2FGHSA-pgm4-439c-5jp6.json?alt=media" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-33167" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/rails/rails/releases/tag/v8.1.2.1" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0833.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0833" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://rubyonrails.org/2026/3/23/Rails-Versions-7-2-3-1-8-0-4-1-and-8-1-2-1-have-been-released" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33167-possible-xss-vulnerability-in-action-pack-debug-exceptions/90913" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33168-possible-xss-vulnerability-in-action-view-tag-helpers/90912" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33169-possible-redos-vulnerability-in-number-to-delimited-in-active-support/90911" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33170-possible-xss-vulnerability-in-safebuffer-in-active-support/90910" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33173-insufficient-filtering-of-metadata-in-active-storage-direct-uploads/90909" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33174-possible-dos-vulnerability-in-active-storage-proxy-mode-via-range-requests/90908" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33176-possible-dos-vulnerability-in-active-support-number-helpers/90907" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33195-possible-path-traversal-in-active-storage-diskservice/90904" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33202-possible-glob-injection-in-active-storage-diskservice/90903" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://discuss.rubyonrails.org/t/cve-2026-33658-possible-dos-vulnerability-in-active-storage-proxy-mode-via-multi-range-requests/90906" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-33167" }, { "category": "external", "summary": "Reference - github; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33167" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-pgm4-439c-5jp6" } ], "remediations": [ { "category": "mitigation", "details": "To mitigate this issue, ensure that `config.consider_all_requests_local` is set to `false` in production environments for Rails applications. This configuration prevents the display of detailed exception pages, thereby eliminating the vector for this XSS vulnerability. This change may require a restart of the Rails application to take effect.", "product_ids": [ "CSAFPID-1439313", "CSAFPID-1439314" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1439313", "CSAFPID-1439314", "CSAFPID-5902096", "CSAFPID-5902821", "CSAFPID-5902822", "CSAFPID-5902823", "CSAFPID-5908066", "CSAFPID-5908067", "CSAFPID-5908068" ] } ], "title": "CVE-2026-33167" } ] }