CVE-2026-61455 Grav before 2.0.1 Decompression Bomb via ZipArchiver
Attackers can cause denial of service by uploading crafted ZIP archives that exhaust disk space in Grav CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-61455?
CVE-2026-61455 is a high-severity denial of service vulnerability in getgrav grav, published on 10 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Grav before 2.0.1 contains a decompression bomb vulnerability in ZipArchiver::extract() that lacks limits on uncompressed size, file count, and nesting depth. Attackers can supply a crafted ZIP archive that expands to fill available disk space, causing denial of service by exhausting storage resources.
Weakness: CWE-409
Which versions are affected by CVE-2026-61455?
How do I fix CVE-2026-61455?
No fix has been published for CVE-2026-61455 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-61455 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61455 exists.
Sources
Also known as GHSA-jxpj-m582-7727.