Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109324Grav before 2.1.7 Memory Exhaustion via Oversized Image Transforms
Medium 6.5
In plain English
A medium-severity security flaw in grav from getgrav. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 74.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Grav before 2.1.7 contains a denial of service vulnerability that allows authenticated media authors to exhaust memory by uploading compressed oversized raster images. Attackers can reference a Twig or Markdown transform so GD or Imagick decodes the full source without dimension checks, letting anonymous requests repeatedly cause page unavailability.
Affected products (as reported)
Weakness: CWE-409 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-h253-r5hw-95r5) vendor-advisory
- VulnCheck Advisory: Grav before 2.1.7 Memory Exhaustion via Oversized Image Transforms third-party-advisory