{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48822", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-22T20:57:10.977Z", "datePublished": "2026-06-17T19:59:34.277Z", "dateUpdated": "2026-06-18T15:42:42.133Z"}, "containers": {"cna": {"title": "Shaarli has Stored Cross-Site Scripting (XSS) via Markdown Reference Links", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/shaarli/Shaarli/security/advisories/GHSA-2hgr-63wv-x462", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/shaarli/Shaarli/security/advisories/GHSA-2hgr-63wv-x462"}, {"name": "https://github.com/shaarli/Shaarli/releases/tag/v0.16.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/shaarli/Shaarli/releases/tag/v0.16.2"}], "affected": [{"vendor": "shaarli", "product": "Shaarli", "versions": [{"version": "< 0.16.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-17T19:59:34.277Z"}, "descriptions": [{"lang": "en", "value": "Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a stored Cross-Site Scripting (XSS) vulnerability in the Markdown-to-HTML conversion process used in the Bookmark Description field. An authenticated user can inject a malicious javascript: URI inside a Markdown link. The vulnerability originates in the filterProtocols method within BookmarkMarkdownFormatter.php.This method attempts to sanitize Markdown links by filtering dangerous protocols (such as javascript:) before rendering. It uses the following regular expression: (#]\\((.*?)\\)#is). This regex is designed to detect inline Markdown links, but it fails to detect Markdown reference-style links because reference-style links are resolved by the Markdown parser after preprocessing. The filterProtocols method never inspects the actual URL used in these references and as a result, an attacker can supply a javascript: URI inside a reference definition. This issue has been fixed in version 0.16.2."}], "source": {"advisory": "GHSA-2hgr-63wv-x462", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/shaarli/Shaarli/security/advisories/GHSA-2hgr-63wv-x462", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-18T15:35:27.903553Z", "id": "CVE-2026-48822", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-18T15:42:42.133Z"}}]}}

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