CVE-2026-58657

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-58657

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58657.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-58657

Aliases

GHSA-ffmg-hfvg-jhg9

Published

2026-07-08T13:49:12.183Z

Modified

2026-07-15T01:49:08.023469586Z

Severity

4.8 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N CVSS Calculator

Summary

Grav - Stored CSS Injection via Markdown Image resize() Action

Details

Grav before 2.0.0 (affected through 2.0.0-rc.9 and the 2.0 branch) contains a stored CSS injection vulnerability in the Markdown image resize() media action. Prior media hardening rejects direct ?style= payloads and unsafe attribute() fallbacks, but the resize() action in Excerpts::processMediaActions() writes caller-controlled values directly into the image's styleAttributes. A lower-privileged content editor who can edit page Markdown can store a crafted image URL with semicolon-delimited CSS declarations in the resize parameters, which are rendered into the final <img style=...> attribute when a higher-privileged reviewer/admin views the page or preview. This does not require JavaScript execution but enables UI redress/overlay and content-manipulation attacks (e.g., a full-viewport fixed overlay). Fixed in 2.0.0.

Database specific

{
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58657.json",
    "cna_assigner": "VulnCheck"
}

References

Affected packages

Git / github.com/getgrav/grav

Affected ranges

Type

GIT

Repo

https://github.com/getgrav/grav

Events

Introduced

e03d29aa0d3ece16d73c1ffccfa78df8bf5f28b8

Fixed

bb4022f44b882ca4615188f4da5a0d646cef02ce

Database specific

{
    "extracted_events": [
        {
            "introduced": "2.0.0-rc.9"
        },
        {
            "fixed": "2.0.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58657.json"