{"id":"CVE-2026-77814","state":"PUBLISHED","title":"Infinite Image Browsing is_path_trusted Prefix Comparison Omits the Trailing Path Separator","description":"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.","publishedAt":"2026-08-21T15:03:08.589Z","updatedAt":"2026-09-24T14:19:39.501Z","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/api.py#L329-L344","https://github.com/zanllp/infinite-image-browsing","https://www.vulncheck.com/advisories/infinite-image-browsing-is-path-trusted-prefix-comparison-omits-the-trailing-path-separator"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77814.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77814","state":"PUBLISHED","datePublished":"2026-08-21T15:03:08.589Z","dateUpdated":"2026-09-24T14:19:39.501Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-21T14:14:43.820Z"},"containers":{"cna":{"title":"Infinite Image Browsing is_path_trusted Prefix Comparison Omits the Trailing Path Separator","descriptions":[{"lang":"en","value":"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."}],"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/api.py#L329-L344","tags":["technical-description"],"name":"is_path_trusted prefix comparison without a trailing separator at v1.8.0"},{"url":"https://github.com/zanllp/infinite-image-browsing","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/infinite-image-browsing-is-path-trusted-prefix-comparison-omits-the-trailing-path-separator","name":"VulnCheck Advisory: Infinite Image Browsing is_path_trusted Prefix Comparison Omits the Trailing Path Separator","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-22","lang":"en","description":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-24T14:19:39.501Z"},"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":"2026-08-21T17:33:19.983444Z","id":"CVE-2026-77814","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":"2026-08-21T17:33:29.308Z"}}]}}}