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{"bugzilla": {"description": "rubygem-rack: Rack stored XSS in Rack::Directory", "id": "2440738", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440738"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-25500", "package_state": [{"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/cluster-logging-operator-bundle", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": 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"pcs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "rhel9/ruby-30", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "rhel9/ruby-33", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "ubi9/ruby-30", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "ubi9/ruby-33", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-18T18:59:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-25500\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-25500\nhttps://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff\nhttps://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.2.22)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.0.0.beta1,3.1.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.2.0,3.2.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "rack", "source": "cna", "vendor": "rack"}, "product": "rack", "vendor": "rack"}], "analysis": {"en": {"generated_at": "2026-04-17T18:33:56.863279+00:00", "value": {"mitigation_remediation": ["Upgrade Rack to at least version 2.2.22, 3.1.20, or 3.2.5.", "Remove or rename any files on the server whose names begin with \"javascript:\" to prevent unsafe href generation.", "Disable Rack::Directory listing or restrict it to trusted users so that directory indexes are not publicly exposed."], "summary": {"action": "Immediate Patch", "impact": "Stored Cross\u2011Site Scripting in the Rack::Directory index can cause arbitrary JavaScript execution in users' browsers when they click directory links."}, "threat_synthesis": {"affected_systems": "The flaw affects Rack library versions older than 2.2.22, 3.1.20, and 3.2.5 in Ruby web applications. Any environment running those versions with Rack::Directory enabled and publicly accessible directory listings is vulnerable.", "description_and_impact": "Rack's directory listing generates an anchor for every file on disk. If a file's name begins with the javascript: scheme, the href in the generated index becomes that exact value, allowing the browser to execute JavaScript. This stored XSS flaw can be abused to run arbitrary code, steal session data, or redirect users. The weakness is classified as CWE\u201179.", "risk_and_exploitability": "The vulnerability has a CVSS score of 5.4, indicating moderate severity. Its EPSS is below 1%, suggesting low likelihood of exploitation, and it is not listed in the CISA KEV catalog. Exploitation requires the presence of a file whose basename starts with \"javascript:\" on the server and a user to click the resulting link in a directory listing, so it is an indirect, user\u2011side vector."}}}}, "created": "2026-02-19T10:11:28.066155+00:00", "updated": "2026-04-17T18:45:25.541798+00:00", "vendors": ["rack", "rack$PRODUCT$rack"]}