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CVE-2026-53757— Emlog: Zip Slip Path Traversal in Plugin/Template ZIP Upload Enables RCE

Quick assessment

Affected
emlog emlog
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.

emlog是emlog团队开源的一款轻量级博客内容管理系统。 emlog 2.6.29及之前版本存在路径遍历漏洞，该漏洞源于emUnZip()函数通过ZipArchive::extractTo()解压ZIP条目时未验证条目路径中的../遍历序列，且仅检查首个条目的子目录结构，攻击者可覆盖服务器文件系统上的任意文件，包括config.php，从而实现远程代码执行。

CVSS 6.9 · Medium EPSS 0.47% · P40

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
emlog emlog <= 2.6.29 affected
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I. Basic Information for CVE-2026-53757

Vulnerability Information
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Vulnerability Title
Emlog: Zip Slip Path Traversal in Plugin/Template ZIP Upload Enables RCE
Source: CVE Program / CVE List V5
Vulnerability Description
Emlog is an open source website building system. In versions 2.6.29 and prior, the emUnZip() function extracts all ZIP entries via ZipArchive::extractTo() without validating entry paths for ../ traversal sequences. Only the first entry's subdirectory structure is checked. An attacker can overwrite arbitrary files on the server filesystem, including config.php for immediate RCE. At time of publication, there are no publicly known patches.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
emlog 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
emlog是emlog团队开源的一款轻量级博客内容管理系统。 emlog 2.6.29及之前版本存在路径遍历漏洞，该漏洞源于emUnZip()函数通过ZipArchive::extractTo()解压ZIP条目时未验证条目路径中的../遍历序列，且仅检查首个条目的子目录结构，攻击者可覆盖服务器文件系统上的任意文件，包括config.php，从而实现远程代码执行。
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
emlog emlog <= 2.6.29 -

II. Public POCs for CVE-2026-53757

# POC Description Source Link Shenlong Link
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default-qwen3.6 · 5833 chars
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III. Intelligence Information for CVE-2026-53757

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Vendor Advisories for CVE-2026-53757 (1)

Same Patch Batch · emlog · 2026-09-04 · 4 CVEs total

CVE-2026-53758 8.7 HIGH Emlog: Stored XSS via Parsedown Markdown Processing - Raw HTML Not Sanitized
CVE-2026-73848 6.9 MEDIUM Emlog: Stored XSS via Tag Name in Article Editor
CVE-2026-53756 4.9 MEDIUM Emlog Blind SQL Injection via Authentication Cookie

IV. Related Vulnerabilities

Same product: emlog
Same vendor: emlog
Same weakness: CWE-22

V. Comments for CVE-2026-53757

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