CVE-2026-77815 (GCVE-0-2026-77815)

Vulnerability from cvelistv5 – Published: 2026-08-21 15:03 – Updated: 2026-08-21 15:03
VLAI
Title
Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories
Summary
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.
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Impacted products
Vendor Product Version CPE status
zanllp infinite-image-browsing Affected: 0 , ≤ 1.8.0 (semver)
    cpe:2.3:a:zanllp:sd-webui-infinite_image_browsing:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-21 00:00
Credits
Show details on NVD website

{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "infinite-image-browsing",
          "programFiles": [
            "scripts/iib/api.py",
            "scripts/iib/tool.py"
          ],
          "repo": "https://github.com/zanllp/infinite-image-browsing",
          "vendor": "zanllp",
          "versions": [
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              "lessThanOrEqual": "1.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
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      ],
      "cpeApplicability": [
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            {
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                {
                  "criteria": "cpe:2.3:a:zanllp:sd-webui-infinite_image_browsing:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "1.8.0",
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      "datePublic": "2026-08-21T00:00:00.000Z",
      "descriptions": [
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          "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."
        }
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            "attackRequirements": "NONE",
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            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
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          "descriptions": [
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              "description": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
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        "dateUpdated": "2026-08-21T15:03:09.325Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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          "name": "GitHub Issue #968",
          "tags": [
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          ],
          "url": "https://github.com/zanllp/infinite-image-browsing/issues/968"
        },
        {
          "name": "GitHub Pull Request #969",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/zanllp/infinite-image-browsing/pull/969"
        },
        {
          "name": "Fix path traversal in is_path_trusted (CWE-22/CWE-59)",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/zanllp/infinite-image-browsing/commit/4057a624c7a23a36f0b4dc6a545b40767d602450"
        },
        {
          "name": "to_abs_path normalising with normpath at v1.8.0",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/zanllp/infinite-image-browsing/blob/v1.8.0/scripts/iib/tool.py#L172-L175"
        },
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          "name": "is_path_trusted consuming the unresolved path at v1.8.0",
          "tags": [
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          "url": "https://github.com/zanllp/infinite-image-browsing/blob/v1.8.0/scripts/iib/api.py#L329-L344"
        },
        {
          "tags": [
            "product"
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          "url": "https://github.com/zanllp/infinite-image-browsing"
        },
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          "tags": [
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          "url": "https://www.vulncheck.com/advisories/infinite-image-browsing-resolves-paths-with-normpath-allowing-symlink-escape-from-scanned-directories"
        }
      ],
      "title": "Infinite Image Browsing Resolves Paths With normpath, Allowing Symlink Escape From Scanned Directories",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-77815",
    "datePublished": "2026-08-21T15:03:09.325Z",
    "dateReserved": "2026-08-21T14:14:43.821Z",
    "dateUpdated": "2026-08-21T15:03:09.325Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-77815",
      "date": "2026-08-22",
      "epss": "0.0041",
      "percentile": "0.34455"
    },
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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. 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  }
}



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