CVE-2026-115351

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Source
https://cve.org/CVERecord?id=CVE-2026-115351
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115351.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115351
Aliases
  • GHSA-xmwc-wjpr-q378
Downstream
Published
2026-10-22T19:13:27Z
Modified
2026-10-31T02:30:22Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Mistune 3.2.1 before 3.3.0 CSS Injection via Figure Directive figwidth Option
Details

Mistune from 3.2.1 before 3.3.0 contains a CSS injection vulnerability that allows attackers controlling markdown input to inject arbitrary style declarations via the unvalidated figwidth option of the figure directive. Attackers can append declarations like background:url() to the rendered figure style attribute, forcing victim browsers to send requests to attacker servers and leak attribute values.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115351.json"
}
References

Affected packages

Git / github.com/lepture/mistune

Affected ranges

Type
GIT
Repo
https://github.com/lepture/mistune
Events
Introduced
067f90861088a496942f5eb43236135352b85d39
Fixed
15c3b79325125272263d7d42492ec8f757447191
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "3.2.1"
                },
                {
                    "fixed": "3.3.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.2.1"
                },
                {
                    "fixed": "3.3.0"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

v3.*
v3.2.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115351.json"