{"id":"CVE-2026-77815","state":"PUBLISHED","title":"Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories","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.","publishedAt":"2026-08-21T15:03:09.325Z","updatedAt":"2026-09-24T14:19:40.444Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["zanllp infinite-image-browsing"],"affected":[{"vendor":"zanllp","product":"infinite-image-browsing","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.8.0","versionType":"semver"}],"repo":"https://github.com/zanllp/infinite-image-browsing","programFiles":["scripts/iib/api.py","scripts/iib/tool.py"]}],"references":["https://github.com/zanllp/infinite-image-browsing/issues/968","https://github.com/zanllp/infinite-image-browsing/pull/969","https://github.com/zanllp/infinite-image-browsing/commit/4057a624c7a23a36f0b4dc6a545b40767d602450","https://github.com/zanllp/infinite-image-browsing/blob/v1.8.0/scripts/iib/tool.py#L172-L175","https://github.com/zanllp/infinite-image-browsing/blob/v1.8.0/scripts/iib/api.py#L329-L344","https://github.com/zanllp/infinite-image-browsing","https://www.vulncheck.com/advisories/infinite-image-browsing-resolves-paths-with-normpath-allowing-symlink-escape-from-scanned-directories"],"weaknesses":["CWE-59"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77815.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77815","state":"PUBLISHED","datePublished":"2026-08-21T15:03:09.325Z","dateUpdated":"2026-09-24T14:19:40.444Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-21T14:14:43.821Z"},"containers":{"cna":{"title":"Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"zanllp","product":"infinite-image-browsing","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.8.0","versionType":"semver"}],"repo":"https://github.com/zanllp/infinite-image-browsing","programFiles":["scripts/iib/api.py","scripts/iib/tool.py"]}],"references":[{"url":"https://github.com/zanllp/infinite-image-browsing/issues/968","tags":["issue-tracking"],"name":"GitHub Issue #968"},{"url":"https://github.com/zanllp/infinite-image-browsing/pull/969","tags":["issue-tracking"],"name":"GitHub Pull Request #969"},{"url":"https://github.com/zanllp/infinite-image-browsing/commit/4057a624c7a23a36f0b4dc6a545b40767d602450","tags":["patch"],"name":"Fix path traversal in is_path_trusted (CWE-22/CWE-59)"},{"url":"https://github.com/zanllp/infinite-image-browsing/blob/v1.8.0/scripts/iib/tool.py#L172-L175","tags":["technical-description"],"name":"to_abs_path normalising with normpath at v1.8.0"},{"url":"https://github.com/zanllp/infinite-image-browsing/blob/v1.8.0/scripts/iib/api.py#L329-L344","tags":["technical-description"],"name":"is_path_trusted consuming the unresolved path at v1.8.0"},{"url":"https://github.com/zanllp/infinite-image-browsing","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/infinite-image-browsing-resolves-paths-with-normpath-allowing-symlink-escape-from-scanned-directories","name":"VulnCheck Advisory: Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","lang":"en","description":"Improper Link Resolution Before File Access ('Link Following')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-24T14:19:40.444Z"},"datePublic":"2026-08-21T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zanllp:sd-webui-infinite_image_browsing:*:*:*:*:*:*:*:*","versionEndIncluding":"1.8.0"}]}]}],"credits":[{"lang":"en","value":"AAtomical","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/zanllp/infinite-image-browsing/issues/968","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-26T17:29:46.505468Z","id":"CVE-2026-77815","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-26T17:30:14.359Z"}}]}}}