CVE-2026-55798

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{"bugzilla": {"description": "python-pillow: Pillow: Arbitrary command injection via shell metacharacters in file paths", "id": "2497462", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497462"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-78", "details": ["Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.", "A flaw was found in Pillow, a Python imaging library. The `WindowsViewer.get_command()` function constructed a command-line interface (CLI) shell command by directly embedding a file path without proper escaping. This allowed shell metacharacters within the file path to inject arbitrary commands into `cmd.exe`. An attacker could exploit this to execute unauthorized commands on the system."], "mitigation": {"lang": "en:us", "value": "This vulnerability is specific to the WindowsViewer class in Pillow, which is only invoked on Windows systems. Red Hat products ship and run on Linux, where the UnixViewer class is used instead, which properly applies shlex.quote() to file paths. The vulnerable Windows code path is not reachable on Red Hat's supported platforms. 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"rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-tensorflow-cuda-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "python-pillow", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "satellite:el8/python-pillow", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-07-06T18:44:38Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-55798\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-55798\nhttps://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst\nhttps://github.com/python-pillow/Pillow/commit/8404ea5fe5df40fc34aa1e51403dd6fce0778b8a\nhttps://github.com/python-pillow/Pillow/commit/88194166691b7b603529b8b036ab3ab9cedd2de4\nhttps://github.com/python-pillow/Pillow/commit/b0e06caa64c1405aa3da0bb1d2bd9a77ca22de7f\nhttps://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6"], "statement": "A flaw was found in Pillow, a Python imaging library. The WindowsViewer.get_command() method constructs a cmd.exe shell command by directly embedding a file path into an f-string without applying shlex.quote() or equivalent escaping. This string is then passed to subprocess.Popen with shell=True, allowing shell metacharacters in the file path to inject and execute arbitrary cmd.exe commands. The vulnerability is specific to the Windows platform; the Linux (UnixViewer) and macOS (MacViewer) equivalents already apply proper shell quoting.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,12.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Pillow", "source": "cna", "vendor": "python-pillow"}, "product": "pillow", "vendor": "python-pillow"}], "created": "2026-07-06T20:45:15.841371+00:00", "updated": "2026-08-01T18:30:05.017481+00:00", "vendors": ["python-pillow", "python-pillow$PRODUCT$pillow"]}