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CVE-2026-61455— Grav before 2.0.1 Decompression Bomb via ZipArchiver

Quick assessment

Affected
getgrav grav
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

getgrav Grav是getgrav个人开发者开源的一套可扩展的内容管理系统。 getgrav Grav 2.0.1之前版本存在资源管理错误漏洞，该漏洞源于ZipArchiver::extract()对解压大小、文件数量和嵌套深度缺少限制，可能导致攻击者通过特制ZIP归档文件耗尽存储资源，造成拒绝服务。

CVSS 6.5 · Medium EPSS 0.44% · P35

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.0.1 affected
2.0.1 unaffected
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I. Basic Information for CVE-2026-61455

Vulnerability Information
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Vulnerability Title
Grav before 2.0.1 Decompression Bomb via ZipArchiver
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
getgrav Grav 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
getgrav Grav是getgrav个人开发者开源的一套可扩展的内容管理系统。 getgrav Grav 2.0.1之前版本存在资源管理错误漏洞，该漏洞源于ZipArchiver::extract()对解压大小、文件数量和嵌套深度缺少限制，可能导致攻击者通过特制ZIP归档文件耗尽存储资源，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 2.0.1 -

II. Public POCs for CVE-2026-61455

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III. Intelligence Information for CVE-2026-61455

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Vendor Advisories for CVE-2026-61455 (2)

Same Patch Batch · getgrav · 2026-07-10 · 10 CVEs total

CVE-2026-55885 6.8 MEDIUM Grav: Admin Backup Zip File Exposes Account Credentials and Configuration Secrets
CVE-2026-61450 6.5 MEDIUM Grav before 2.0.2 Config Exfiltration via offsetGet Filter
CVE-2026-55890 4.8 MEDIUM Grav: Stored CSS injection via Markdown image ?style=… reaches MediaObjectTrait::style()
CVE-2026-61456 4.6 MEDIUM Grav before 1.0.3 Stored XSS via SVG Upload API
CVE-2026-53653 Grav: Unauthenticated denial of service via unbounded image derivative dimensions
CVE-2026-58493 grav-plugin-database: DSN Parameter Injection via Unsanitized Configuration Values in Conn
CVE-2026-58492 grav-plugin-database: SQL Injection in PDO::tableExists() due to Unsanitized Table Name In
CVE-2026-59193 Grav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()
CVE-2026-59190 Grav Admin Plugin — IDOR Privilege Escalation via saveUser()

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-409

V. Comments for CVE-2026-61455

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