zanllp infinite-image-browsing up to 1.8.0 scripts/iib/api.py is_path_trusted path path traversal

Summaryinfo

A vulnerability was found in zanllp infinite-image-browsing up to 1.8.0. It has been rated as problematic. Impacted is the function is_path_trusted of the file scripts/iib/api.py. This manipulation of the argument path causes path traversal. This vulnerability is registered as CVE-2026-77814. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in zanllp infinite-image-browsing up to 1.8.0. It has been declared as problematic. Affected by this vulnerability is the function is_path_trusted of the file scripts/iib/api.py. The manipulation of the argument path with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. The summary by CVE is:

is_path_trusted in scripts/iib/api.py compares the requested path against each allowed parent directory with path.startswith(parent_path), without appending a path separator. A directory whose name merely begins with an allowed path therefore satisfies the comparison, so where /data/images is allowed a request for /data/images_private/secret.txt is treated as trusted and served by FileResponse, disclosing files the confinement was meant to exclude. 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 compares against parent_path joined with os.sep.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-77814 since 08/21/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/21/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

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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