{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-2102", "assignerOrgId": "b6ef82d7-f637-461b-aedd-74f5857d5f5b", "state": "PUBLISHED", "assignerShortName": "WrenSecurity", "dateReserved": "2026-02-06T13:04:37.324Z", "datePublished": "2026-11-02T15:26:54.677Z", "dateUpdated": "2026-11-02T15:26:54.677Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b6ef82d7-f637-461b-aedd-74f5857d5f5b", "shortName": "WrenSecurity", "dateUpdated": "2026-11-02T15:26:54.677Z"}, "title": "XSS in wrensec-commons CREST framework HTTP binding via _mimeType parameter", "datePublic": "2026-11-02T15:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "XSS Using HTTP Query Strings"}]}], "affected": [{"vendor": "Wren Security", "product": "wrensec-commons", "collectionURL": "https://repo1.maven.org/maven2", "packageName": "org.wrensecurity.commons:json-resource-http", "repo": "https://github.com/WrenSecurity/wrensec-commons/", "versions": [{"status": "affected", "version": "0", "lessThan": "22.6.2", "versionType": "semver"}, {"status": "affected", "version": "23.0.0-M1", "lessThan": "23.0.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "wrensec-commons contains a reflected cross-site scripting (XSS) vulnerability in the CREST framework's HTTP binding. The HttpUtils.prepareResponse() method used the _mimeType request parameter to set the Content-Type response header without proper sanitization. By sending a GET request with _mimeType=text/html, an attacker could cause the browser to interpret a CREST JSON response as HTML, enabling execution of arbitrary JavaScript in the victim's browser. The vulnerability is exploitable by tricking a user into visiting a crafted URL targeting any deployed CREST endpoint. The issue is fixed in versions 22.6.2 and 23.0.0.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>wrensec-commons contains a reflected cross-site scripting (XSS) vulnerability in the CREST framework's HTTP binding. The HttpUtils.prepareResponse() method used the _mimeType request parameter to set the Content-Type response header without proper sanitization. By sending a GET request with _mimeType=text/html, an attacker could cause the browser to interpret a CREST JSON response as HTML, enabling execution of arbitrary JavaScript in the victim's browser. The vulnerability is exploitable by tricking a user into visiting a crafted URL targeting any deployed CREST endpoint. The issue is fixed in versions 22.6.2 and 23.0.0.</p>"}]}], "references": [{"url": "https://github.com/WrenSecurity/wrensec-commons/security/advisories/GHSA-4vhv-49g2-496q", "name": "GitHub Security Advisory GHSA-4vhv-49g2-496q", "tags": ["third-party-advisory"]}, {"url": "https://github.com/WrenSecurity/wrensec-commons/commit/65bbfd8c63c42e84ff7699aa5b82a22c08a12624", "name": "Fix commit (23.x): Remove implicit support for _mimeType parameter to prevent XSS attacks", "tags": ["patch"]}, {"url": "https://github.com/WrenSecurity/wrensec-commons/commit/5b50c64c14943b6f4d7faf996345e603956bae1d", "name": "Fix commit (22.x backport): Remove implicit support for _mimeType parameter to prevent XSS attacks", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}}], "workarounds": [{"lang": "en", "value": "Disallow the _mimeType request parameter in both query string and x-www-form-urlencoded request bodies.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Disallow the _mimeType request parameter in both query string and x-www-form-urlencoded request bodies.</p>"}]}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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