zanllp infinite-image-browsing up to 1.8.0 Path Normalization scripts/iib/tool.py to_abs_path symlink

Summaryinfo

A vulnerability categorized as problematic has been discovered in zanllp infinite-image-browsing up to 1.8.0. The affected element is the function to_abs_path of the file scripts/iib/tool.py of the component Path Normalization. Such manipulation leads to symlink. This vulnerability is documented as CVE-2026-77815. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in zanllp infinite-image-browsing up to 1.8.0. It has been rated as problematic. Affected by this issue is the function to_abs_path of the file scripts/iib/tool.py of the component Path Normalization. The manipulation with an unknown input leads to a symlink vulnerability. Using CWE to declare the problem leads to CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-77815 since 08/21/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/21/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• zanllp

Name

• infinite-image-browsing

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8.0

Website

• Product: https://github.com/zanllp/infinite-image-browsing/

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