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Vulnerability record · CVE-2014-3146 · published 14 May 2014

CVE-2014-3146: Lxml cross-site scripting vulnerability

LLxml · Lxml

Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

6.1 CVSS 3.1 Medium EPSS 6.3% · top 6.6% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
6.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
28References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://advisories.mageia.org/MGASA-2014-0218.html
http://lists.opensuse.org/opensuse-updates/2014-05/msg00083.html
http://lxml.de/3.3/changes-3.3.5.html
http://seclists.org/fulldisclosure/2014/Apr/210
http://seclists.org/fulldisclosure/2014/Apr/319 Exploit
http://secunia.com/advisories/58013 Vendor Advisory
http://secunia.com/advisories/58744
http://secunia.com/advisories/59008
http://www.debian.org/security/2014/dsa-2941
http://www.mandriva.com/security/advisories?name=MDVSA-2015:112
http://www.openwall.com/lists/oss-security/2014/05/09/7
http://www.securityfocus.com/bid/67159 Exploit
http://www.ubuntu.com/usn/USN-2217-1
https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.html Exploit
http://advisories.mageia.org/MGASA-2014-0218.html
http://lists.opensuse.org/opensuse-updates/2014-05/msg00083.html
http://lxml.de/3.3/changes-3.3.5.html
http://seclists.org/fulldisclosure/2014/Apr/210
http://seclists.org/fulldisclosure/2014/Apr/319 Exploit
http://secunia.com/advisories/58013 Vendor Advisory
http://secunia.com/advisories/58744
http://secunia.com/advisories/59008
http://www.debian.org/security/2014/dsa-2941
http://www.mandriva.com/security/advisories?name=MDVSA-2015:112
http://www.openwall.com/lists/oss-security/2014/05/09/7
http://www.securityfocus.com/bid/67159 Exploit
http://www.ubuntu.com/usn/USN-2217-1
https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.html Exploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2014-3146), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.