Medium severity · published Jul 10, 2026
CVE-2026-61455
Grav before 2.0.1 Decompression Bomb via ZipArchiver
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
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 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
before 2.0.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-61455
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-61455
vendor-advisory
https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56
third-party-advisory
https://www.vulncheck.com/advisories/grav-before-decompression-bomb-via-ziparchiver
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