CVE-2026-58657

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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
Published
2026-07-08T13:49:12Z
Modified
2026-10-28T02:30:29Z
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 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 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58657.json"
}
References

Affected packages

Git / github.com/getgrav/grav

Affected ranges

Type
GIT
Repo
https://github.com/getgrav/grav
Events
Introduced
e03d29aa0d3ece16d73c1ffccfa78df8bf5f28b8
Fixed
bb4022f44b882ca4615188f4da5a0d646cef02ce
Fixed
6582166173bb8eb5869d96aea384e0e73777c94c
Fixed
e03d29aa0d3ece16d73c1ffccfa78df8bf5f28b8
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "2.0.0-rc.9"
                },
                {
                    "fixed":  "2.0.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "fixed":  "6582166173bb8eb5869d96aea384e0e73777c94c"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "e03d29aa0d3ece16d73c1ffccfa78df8bf5f28b8"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

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