CVE-2026-105830

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-105830
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105830.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-105830
Aliases
Downstream
Published
2026-10-08T14:10:31Z
Modified
2026-10-10T02:47:26Z
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
league/commonmark 2.0.0 before 2.10.2 Quadratic DoS via TableStartParser
Details

league/commonmark from 2.0.0 before 2.10.2 contains a quadratic-time denial of service vulnerability in the GitHub Flavored Markdown Table extension's TableStartParser::tryStart() block-start scan. Unauthenticated attackers can submit a large paragraph of pipe-free lines not starting with letters, forcing repeated full-buffer strpos scans that exhaust PHP worker CPU.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105830.json"
}
References

Affected packages

Git / github.com/thephpleague/commonmark

Affected ranges

Type
GIT
Repo
https://github.com/thephpleague/commonmark
Events
Introduced
167142baf9a6b946f99ad9325b06028606f8238e
Fixed
692e90b901877bdfd727e51270ce4394633c6e74
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "2.0.0"
        },
        {
            "fixed": "2.10.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

2.*
2.0.0
2.0.1
2.0.2
2.1.0
2.10.0
2.10.1
2.2.0
2.3.0
2.4.0
2.5.0
2.6.0
2.7.0
2.8.0
2.9.0
2.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105830.json"