Medium severity · published Oct 12, 2026
CVE-2026-109324
Grav before 2.1.7 Memory Exhaustion via Oversized Image Transforms
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
before 2.1.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109324
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109324
vendor-advisory
https://github.com/getgrav/grav/security/advisories/GHSA-h253-r5hw-95r5
third-party-advisory
https://www.vulncheck.com/advisories/grav-before-2.1.7-memory-exhaustion-via-oversized-image-transforms
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