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CVE-2026-77815— Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories

Quick assessment

Affected
zanllp infinite-image-browsing
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.

zanllp Infinite Image Browsing是中国zanllp个人开发者的一款无限图片浏览组件。 zanllp Infinite Image Browsing 1.8.0及之前版本存在后置链接漏洞，该漏洞源于scripts/iib/tool.py中的to_abs_path函数使用os.path.normpath规范化路径但不解析符号链接，攻击者可利用符号链接绕过路径信任检查，导致任意文件泄露。

CVSS 7.5 · High EPSS 0.51% · P42

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
zanllp infinite-image-browsing ≤ 1.8.0 affected
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I. Basic Information for CVE-2026-77815

Vulnerability Information
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Vulnerability Title
Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories
Source: CVE Program / CVE List V5
Vulnerability Description
to_abs_path in scripts/iib/tool.py normalised the requested path with os.path.normpath, which collapses dot segments but does not resolve symbolic links. A symlink placed inside a scanned directory therefore satisfies the containment comparison performed by is_path_trusted in scripts/iib/api.py while pointing outside that directory, and FileResponse follows the link when serving the response, so a link created in an image directory and targeting a file such as /etc/passwd discloses that file. Whether the check applies depends on get_enable_access_control in scripts/iib/tool.py: it returns true when IIB_ACCESS_CONTROL is set to enable, false when set to disable, and otherwise true when the host Stable Diffusion WebUI was started with share, ngrok, listen or server_name, falling back to false. Confinement is therefore active in the network-exposed WebUI deployments that rely on it, while a standalone run with no such option serves every readable file regardless of this flaw. The fix resolves the path with os.path.realpath.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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
Vulnerability Title
zanllp Infinite Image Browsing 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zanllp Infinite Image Browsing是中国zanllp个人开发者的一款无限图片浏览组件。 zanllp Infinite Image Browsing 1.8.0及之前版本存在后置链接漏洞，该漏洞源于scripts/iib/tool.py中的to_abs_path函数使用os.path.normpath规范化路径但不解析符号链接，攻击者可利用符号链接绕过路径信任检查，导致任意文件泄露。
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
zanllp infinite-image-browsing 0 ~ 1.8.0 -

II. Public POCs for CVE-2026-77815

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III. Intelligence Information for CVE-2026-77815

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Patches & Fixes for CVE-2026-77815 (2)

Vendor Advisories for CVE-2026-77815 (1)

Other References for CVE-2026-77815 (1)

IV. Related Vulnerabilities

Same product: infinite-image-browsing
Same vendor: zanllp
Same weakness: CWE-59

V. Comments for CVE-2026-77815

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