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ubuntu-cve-2026-49836
Vulnerability from osv_ubuntu
Published
2026-09-10 22:16
Modified
2026-09-16 11:35
Summary
Details

psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.17.1, SmartObject.save() writes an embedded smart object to a path taken verbatim from the PSD file. Because that name is attacker-controlled and unsanitised, a tool that extracts embedded objects from an untrusted .psd can be made to write attacker-chosen bytes to an attacker-chosen path (absolute or ../-traversing), outside its intended output directory. A secondary issue in SmartObject.open() for external-kind smart objects allows the attacker-controlled fullPath descriptor to be used as an arbitrary file read path, enabling exfiltration of the read content to the controlled write destination. Both issues are fixed in v1.17.1.

Severity
4.6 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-psd-tools",
            "binary_version": "1.9.30+dfsg.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "psd-tools",
        "purl": "pkg:deb/ubuntu/psd-tools@1.9.30+dfsg.1-1build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.28+dfsg.1-1",
        "1.9.28+dfsg.1-1build1",
        "1.9.30+dfsg.1-1",
        "1.9.30+dfsg.1-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-psd-tools",
            "binary_version": "1.12.1+dfsg.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "psd-tools",
        "purl": "pkg:deb/ubuntu/psd-tools@1.12.1+dfsg.1-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.7+dfsg.1-1",
        "1.10.7+dfsg.1-1build1",
        "1.10.9+dfsg.1-1",
        "1.12.0+dfsg.1-1",
        "1.12.1+dfsg.1-1"
      ]
    }
  ],
  "aliases": [],
  "details": "psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.17.1, `SmartObject.save()` writes an embedded smart object to a path taken verbatim from the PSD file. Because that name is attacker-controlled and unsanitised, a tool that extracts embedded objects from an untrusted `.psd` can be made to write attacker-chosen bytes to an attacker-chosen path (absolute or `../`-traversing), outside its intended output directory. A secondary issue in `SmartObject.open()` for external-kind smart objects allows the attacker-controlled `fullPath` descriptor to be used as an arbitrary file read path, enabling exfiltration of the read content to the controlled write destination. Both issues are fixed in v1.17.1.",
  "id": "UBUNTU-CVE-2026-49836",
  "modified": "2026-09-16T11:35:35Z",
  "published": "2026-09-10T22:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-49836"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-49836"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/psd-tools/psd-tools/security/advisories/GHSA-2rmg-vrx8-9j2f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/psd-tools/psd-tools/pull/657"
    },
    {
      "type": "REPORT",
      "url": "http://github.com/psd-tools/psd-tools/releases/tag/v1.17.1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/psd-tools/psd-tools/pull/657"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/psd-tools/PYSEC-2026-2969.yaml"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-49836"
  ]
}



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