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CVE-2026-72696— Grav CMS before 2.0.16 Symlink Following via createLockFile

Quick assessment

Affected
getgrav grav
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grav CMS 2.0.16 之前的版本在 Scheduler Job::createLockFile() 函数中存在一个符号链接跟随漏洞（symlink following vulnerability）。本地攻击者可以通过在可写的临时目录中，预先创建具有可预测路径的符号链接，从而覆盖任意文件。攻击者可以将符号链接放置在可预测的锁文件路径上，指向 Web 服务器进程有权写入的任何文件；在下一次计划任务运行时，该符号链接将被跟随，目标文件的内容会被覆盖为任务 ID 字符串。

CVSS 8.4 · High EPSS 0.14% · P4

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.0.16 affected
2.0.16 unaffected
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I. Basic Information for CVE-2026-72696

Vulnerability Information
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Vulnerability Title
Grav CMS before 2.0.16 Symlink Following via createLockFile
Source: CVE Program / CVE List V5
Vulnerability Description
Grav CMS before 2.0.16 contains a symlink following vulnerability in Scheduler Job::createLockFile() that allows local attackers to overwrite arbitrary files by pre-creating symlinks at predictable lock file paths in the world-writable temp directory. Attackers can place a symlink at the predictable lock path pointing to any file the web server process can write to, and the next scheduled job run will follow the symlink and overwrite the target file's content with the job ID string.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 2.0.16 -

II. Public POCs for CVE-2026-72696

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8787 chars
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Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-72696

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Vendor Advisories for CVE-2026-72696 (2)

Same Patch Batch · getgrav · 2026-08-25 · 15 CVEs total

CVE-2026-56710 9.8 CRITICAL Grav Login Plugin before 1.0.16 Privilege Escalation via Unlock
CVE-2026-75574 8.8 HIGH Grav before 4.2.2 Remote Code Execution via Email Twig
CVE-2026-72695 8.1 HIGH Grav before 2.0.16 Path Traversal via MediaUploadTrait deleteFile
CVE-2026-56707 7.7 HIGH Grav Flex Objects 1.4.0 through 1.4.7 Authorization Bypass via Shortcode
CVE-2026-72700 7.5 HIGH Grav before 3.9.1 Timing Attack via Non-Constant-Time Token Comparison
CVE-2026-76846 7.5 HIGH Grav before 2.0.16 Information Disclosure via Twig Sandbox
CVE-2026-56709 7.5 HIGH Grav before 3.9.2 Host Header Injection via sendInvitationEmail
CVE-2026-72698 6.5 MEDIUM Grav CMS before 2.0.16 Information Disclosure via Twig Sandbox Bypass
CVE-2026-72697 6.5 MEDIUM Grav CMS before 2.0.16 Path Traversal via media_directory
CVE-2026-76839 6.5 MEDIUM Grav before 2.0.16 Information Disclosure via offsetGet
CVE-2026-72702 5.4 MEDIUM Grav CMS before 2.0.16 Origin Validation Bypass via Referer
CVE-2026-72699 5.3 MEDIUM Grav Login Plugin before 3.9.1 Email Enumeration via Registration
CVE-2026-56708 5.3 MEDIUM Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
CVE-2026-72701 3.7 LOW Grav CMS before 2.0.16 Timing Attack via verifyNonce

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-59

V. Comments for CVE-2026-72696

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