---
id: CVE-2026-61455
title: >-
  Grav before 2.0.1 contains a decompression bomb vulnerability in
  ZipArchiver::extract() that lacks limits on uncompressed size, file count, and
  nesting depth
summary: >-
  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…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-409
vendor: getgrav
product: grav
affected:
  - grav < 2.0.1
published: '2026-07-10'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:25.363'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61455'
references:
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/grav-before-decompression-bomb-via-ziparchiver
    label: disclosure@vulncheck.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-10T14:49:21.784927Z'
epss: 0.00436
epssPercentile: 0.35801
ingestedAt: '2026-10-08T16:52:14.698Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.