CVE-2026-115348

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Source
https://cve.org/CVERecord?id=CVE-2026-115348
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115348.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115348
Aliases
  • GHSA-x2gr-6qf2-fc9x
Downstream
Related
Published
2026-10-22T19:13:25Z
Modified
2026-11-04T17:27:21Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Mistune before 3.3.0 Quadratic-Time DoS via parse_link_text
Details

Mistune from 3.0.0 before 3.3.0 contains an algorithmic complexity vulnerability in the inline link parser's parse_link_text function that allows unauthenticated attackers to exhaust CPU with unbalanced brackets. Attackers can submit Markdown containing many unbalanced '[' or '![' characters, forcing repeated unbounded forward scans and tying up worker processes for minutes.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115348.json"
}
References

Affected packages

Git / github.com/lepture/mistune

Affected ranges

Type
GIT
Repo
https://github.com/lepture/mistune
Events
Introduced
4222ee11c119fc8b308c6f8137f35a394e08065b
Fixed
15c3b79325125272263d7d42492ec8f757447191
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "3.0.0"
                },
                {
                    "fixed": "3.3.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.0.0"
                },
                {
                    "fixed": "3.3.0"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

v3.*
v3.0.0
v3.0.1
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.2.0
v3.2.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115348.json"