CVE-2026-61455 | Grav before 2.0.1 contains a decompression bomb vulnerabilit… | CVSS 6.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-61455
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-09 14:06 UTC
Published: 2026-07-10 13:58 UTC
Last updated: 2026-07-10 14:49 UTC
Primary CWE: CWE-409
Improper Handling of Highly Compressed Data (Data Amplificat…
Vendor / Product: getgrav / grav
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
getgrav	grav	—	0 < 2.0.1, 2.0.1

Weakness (CWE)

CWE	Source	Description
CWE-409	cna	Improper Handling of Highly Compressed Data (Data Amplification)

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.1	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (2)

GitHub Security Advisory (GHSA-928x-9mpw-8h56) https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56
VulnCheck Advisory: Grav before 2.0.1 Decompression Bomb via ZipArchiver https://www.vulncheck.com/advisories/grav-before-decompression-bomb-via-ziparchiver