Vulnerability in Getgrav Grav
CVE-2026-61455
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Getgrav Grav — versions 0, 2.0.1
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56 (vendor-advisory)
- www.vulncheck.com/advisories/grav-before-decompression-bomb-via-ziparchiver (third-party-advisory)
Frequently asked questions
- What is CVE-2026-61455?
- CVE-2026-61455 is a medium-severity vulnerability in Getgrav Grav, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-07-10.
- How severe is CVE-2026-61455?
- Medium severity. CVSS v3 base score is 6.5 out of 10.