CVE-2026-68747

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Source
https://cve.org/CVERecord?id=CVE-2026-68747
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68747.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-68747
Aliases
Published
2026-08-06T14:50:03.143Z
Modified
2026-08-08T03:48:19.137029734Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
Summary
CSS sanitizer allowlist bypass in html_sanitize_ex via non-declaration input
Details

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the CSS scrubber in rrrene htmlsanitizeex allows an unauthenticated remote attacker to inject CSS at-rules, including an import of a remote stylesheet, into a page served to other users. HtmlSanitizeEx.Scrubber.CSS.scrub/1 applies its property and value allowlist through a Regex.replace over substrings matching a property: value declaration pattern, so input that does not match that pattern is never inspected and is copied to the output unchanged. @import url(//attacker.example/style.css); survives, while the same URL inside a background: url(...) declaration is removed.

Element boundaries are resolved before the scrubber runs, so injected content does not escape the <style> element and no script executes.

This issue affects htmlsanitizeex: from 0.3.1 before 1.5.4.

Database specific 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "21f90012eb21aa36f4e3701b7547e12faf0f3c8b"
                },
                {
                    "fixed": "0b9f9ad63a7529d4f2c3c1134c371adc3e654308"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68747.json",
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-74"
    ]
}
References

Affected packages

Git / github.com/rrrene/html_sanitize_ex

Affected ranges

Type
GIT
Repo
https://github.com/rrrene/html_sanitize_ex
Events
Introduced
088f92b18a4a3911a862b527d5eb3713f9abac24
Fixed
de5cc8085029dae9136af47a9c4712152d8a76f0
Fixed
0b9f9ad63a7529d4f2c3c1134c371adc3e654308
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0.3.1"
        },
        {
            "fixed": "1.5.4"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.3.1
v1.*
v1.0.0
v1.0.1
v1.2.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.5.0
v1.5.0-rc.0
v1.5.1
v1.5.2
v1.5.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68747.json"