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CVE-2026-109324— Grav before 2.1.7 Memory Exhaustion via Oversized Image Transforms

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.

在 Grav 2.1.7 之前的版本中存在一个拒绝服务漏洞，允许经过身份验证的媒体作者通过上传压缩的大尺寸光栅图像耗尽内存。攻击者可以引用 Twig 或 Markdown 转换功能，使得 GD 或 Imagick 在没有进行尺寸检查的情况下解码完整源文件，从而导致匿名用户重复发送请求造成页面不可用。

CVSS 6.5 · Medium EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.1.7 affected
2.1.7 unaffected
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I. Basic Information for CVE-2026-109324

Vulnerability Information
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Vulnerability Title
Grav before 2.1.7 Memory Exhaustion via Oversized Image Transforms
Source: CVE Program / CVE List V5
Vulnerability Description
Grav before 2.1.7 contains a denial of service vulnerability that allows authenticated media authors to exhaust memory by uploading compressed oversized raster images. Attackers can reference a Twig or Markdown transform so GD or Imagick decodes the full source without dimension checks, letting anonymous requests repeatedly cause page unavailability.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 2.1.7 -

II. Public POCs for CVE-2026-109324

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III. Intelligence Information for CVE-2026-109324

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Vendor Advisories for CVE-2026-109324 (2)

Same Patch Batch · getgrav · 2026-10-12 · 14 CVEs total

CVE-2026-109321 9.1 CRITICAL Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass
CVE-2026-109313 8.1 HIGH Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Remember-Me Cookie
CVE-2026-109312 8.1 HIGH Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Profile Update Form
CVE-2026-109325 7.5 HIGH Grav from 2.0.22 before 2.1.7 Clockwork Profiler Authentication Bypass via Proxy
CVE-2026-109326 7.5 HIGH Grav before 2.1.7 Information Disclosure via Nested .git Directories
CVE-2026-109314 7.3 HIGH Grav Login Plugin 1.2.0 before 3.9.9 Password Reset Token Disclosure via Reset Page
CVE-2026-109317 7.2 HIGH Grav API Plugin before 1.0.36 Privilege Escalation via Scalar Access Grants
CVE-2026-109315 6.5 MEDIUM Grav 2.0.22 before 2.1.7 Clockwork Debugger Token Disclosure via Twig Sandbox
CVE-2026-109316 6.5 MEDIUM Grav Data Manager 1.4.0 through 1.4.5 Unauthenticated File Deletion via Admin
CVE-2026-109322 6.1 MEDIUM Grav Guestbook before 0.5.2 Stored XSS via AJAX Pagination and Admin Views
CVE-2026-109320 5.4 MEDIUM Grav API Plugin before 1.0.36 Disabled Account Session Access Bypass
CVE-2026-109323 5.3 MEDIUM Grav Star Ratings 2.0.1 through 2.0.3 Missing Server-Side vote_access Authorization
CVE-2026-109319 4.3 MEDIUM Grav Guestbook Plugin 0.5.0 and 0.5.1 Missing Authorization and CSRF in Moderation

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-109324

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