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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pdm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.27.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47763"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-10T20:32:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nPDM writes several project-local state or configuration files without symlink protection. If a malicious repository places those files as symlinks, local PDM operations can overwrite the symlink targets.\n\nThis creates an arbitrary file clobber primitive relative to the privileges of the invoking user.\n\n## Affected Behavior\n\n- Project-local config writes can affect files outside the repository\n- The most stable demonstrated sink is `pdm.toml`\n- Related sinks include `.pdm-python` and `.python-version`\n\n## Affected Code\n\n- `src/pdm/project/config.py:303-350`\n- `src/pdm/project/core.py:209-217`\n- `src/pdm/cli/commands/use.py:187-189`\n\n## Technical Details\n\n`Config.__init__()` resolves the project-local `pdm.toml` path and `_save_config()` writes to the resolved target. If `PROJECT_ROOT/pdm.toml` is a symlink to another file, `pdm config -l ...` updates the target file instead of refusing the write.\n\nThe same general problem exists for other project-local persistence paths that are written directly with no `lstat` / `O_NOFOLLOW` protection.\n\nFor the `pdm.toml` PoC specifically, the target file must already contain parseable TOML. Otherwise the load step fails before the write path is reached. That parser constraint does not apply to the `.pdm-python` or `.python-version` sinks.\n\n## Impact\n\n- Arbitrary file clobber as the invoking user\n- Destructive modification of local files outside the repository root\n- Useful primitive for privilege abuse when `pdm` is run in elevated contexts\n\n## Reproduction\n\nPoC:\n\n```bash\n# Replace this with a Python interpreter that can run `python -m pdm`.\nPDM_PY=/path/to/python-with-pdm\ntmpdir=$(mktemp -d)\ntarget=\"$tmpdir/clobbered-target.toml\"\n\ncat \u003e \"$target\" \u003c\u003c\u0027EOF\u0027\n[seed]\nvalue = 1\nEOF\n\nln -s \"$target\" \"$tmpdir/pdm.toml\"\n\ncat \u003e \"$tmpdir/pyproject.toml\" \u003c\u003c\u0027EOF\u0027\n[project]\nname = \"symlink-clobber-demo\"\nversion = \"0.0.1\"\nEOF\n\n(\n  cd \"$tmpdir\" \u0026\u0026\n  \"$PDM_PY\" -m pdm config -l venv.in_project false\n)\n\ncat \"$target\"\n```\n\nExpected result:\n\n- A temporary project is created\n- `pdm.toml` is a symlink to another TOML file\n- Running `pdm config -l venv.in_project false` modifies the symlink target\n\nObserved output from local validation:\n\n```text\n--- target ---\n[seed]\nvalue = 1\n\n[venv]\nin_project = false\n```\n\n## Severity\n\nMedium\n\n## CVSS v4.0\n\n- Base score: `6.8` (`Medium`)\n- Vector: `CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N`\n\nRationale:\n\n- `AV:L`: exploitation requires local execution of `pdm` against an attacker-prepared checkout\n- `AC:L`: there is no complex constraint once the symlink sink exists\n- `AT:N`: no extra prerequisite beyond the victim running the relevant command is required\n- `PR:N`: the attacker does not need prior privileges on the victim system\n- `UI:A`: the victim must actively run a command that writes project-local state or config\n- `VC:N`: the demonstrated issue is a write primitive, not a direct read primitive\n- `VI:H`: the attacker can cause unauthorized modification of files outside the repository root\n- `VA:L`: file clobber can disrupt local operation, but direct same-step availability impact is lower than a full RCE\n- `SC:N/SI:N/SA:N`: the base score is limited to the directly affected system\n\n## Root Cause\n\nProject-local file sinks are treated as trusted regular files and are written without symlink checks or guarded atomic replacement.\n\n## Recommended Remediation\n\n- Refuse to write project-local config/state files when the destination is a symlink\n- Use `lstat` and `O_NOFOLLOW` where available\n- Avoid resolving attacker-controlled project-local paths before writing\n- Use atomic temp-file replacement only after confirming the destination is a regular file\n\n## Disclosure Notes\n\nThis issue is independent from the code-execution issues above. It is best tracked as a separate CVE candidate because the root cause and remediation are different.",
  "id": "GHSA-ghq2-5c67-fprm",
  "modified": "2026-06-10T20:32:56Z",
  "published": "2026-06-10T20:32:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pdm-project/pdm/security/advisories/GHSA-ghq2-5c67-fprm"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pdm-project/pdm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pdm-project/pdm/releases/tag/2.27.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PDM: Project-Local State and Config Writes Follow Symlinks"
}

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        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-47764",
          "url": "https://www.suse.com/security/cve/CVE-2026-47764"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268385 for CVE-2026-47764",
          "url": "https://bugzilla.suse.com/1268385"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.aarch64",
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.s390x",
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.x86_64",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.aarch64",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.s390x",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.x86_64",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.aarch64",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.s390x",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.x86_64"
          ]
        }
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      "threats": [
        {
          "category": "impact",
          "date": "2026-06-25T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-47764"
    },
    {
      "cve": "CVE-2026-47781",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-47781"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "unknown",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.aarch64",
          "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.ppc64le",
          "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.s390x",
          "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.x86_64",
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          "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.x86_64",
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          "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.x86_64"
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-47781",
          "url": "https://www.suse.com/security/cve/CVE-2026-47781"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268386 for CVE-2026-47781",
          "url": "https://bugzilla.suse.com/1268386"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.aarch64",
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.s390x",
            "openSUSE Tumbleweed:python311-pdm-2.28.0-1.1.x86_64",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.aarch64",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.s390x",
            "openSUSE Tumbleweed:python313-pdm-2.28.0-1.1.x86_64",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.aarch64",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.s390x",
            "openSUSE Tumbleweed:python314-pdm-2.28.0-1.1.x86_64"
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      "threats": [
        {
          "category": "impact",
          "date": "2026-06-25T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-47781"
    }
  ]
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pdm",
        "purl": "pkg:pypi/pdm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.27.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.0",
        "0.0.1",
        "0.0.3",
        "0.0.4",
        "0.0.5",
        "0.0.6",
        "0.1.0",
        "0.1.1",
        "0.1.2",
        "0.10.0",
        "0.10.1",
        "0.10.2",
        "0.11.0",
        "0.12.0",
        "0.12.1",
        "0.12.2",
        "0.12.3",
        "0.2.0",
        "0.2.1",
        "0.2.2",
        "0.2.3",
        "0.2.4",
        "0.2.5",
        "0.2.6",
        "0.3.0",
        "0.3.1",
        "0.3.2",
        "0.4.0",
        "0.4.1",
        "0.4.2",
        "0.5.0",
        "0.6.0",
        "0.6.1",
        "0.6.2",
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        "0.9.0",
        "0.9.1",
        "0.9.2",
        "1.0.0",
        "1.0.0b0",
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        "1.1.0",
        "1.10.0",
        "1.10.1",
        "1.10.2",
        "1.10.3",
        "1.11.0",
        "1.11.1",
        "1.11.2",
        "1.11.3",
        "1.12.0",
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        "1.12.2",
        "1.12.3",
        "1.12.4",
        "1.12.5",
        "1.12.6",
        "1.12.7",
        "1.12.8",
        "1.13.0",
        "1.13.0.post0",
        "1.13.1",
        "1.13.2",
        "1.13.3",
        "1.13.4",
        "1.13.5",
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        "1.14.0",
        "1.14.1",
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        "2.22.2",
        "2.22.3",
        "2.22.4",
        "2.23.0",
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        "2.25.2",
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        "2.26.9",
        "2.3.0",
        "2.3.1",
        "2.3.2",
        "2.3.3",
        "2.3.4",
        "2.4.0",
        "2.4.1",
        "2.4.2",
        "2.4.3",
        "2.4.4",
        "2.4.5",
        "2.4.6",
        "2.4.7",
        "2.4.8",
        "2.4.9",
        "2.5.0",
        "2.5.0b0",
        "2.5.1",
        "2.5.2",
        "2.5.3",
        "2.5.4",
        "2.5.5",
        "2.5.6",
        "2.6.0",
        "2.6.1",
        "2.7.0",
        "2.7.1",
        "2.7.2",
        "2.7.3",
        "2.7.4",
        "2.8.0",
        "2.8.0a0",
        "2.8.0a1",
        "2.8.0a2",
        "2.8.1",
        "2.8.2",
        "2.9.0",
        "2.9.1",
        "2.9.2",
        "2.9.3"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47763",
    "GHSA-ghq2-5c67-fprm"
  ],
  "details": "## Summary\n\nPDM writes several project-local state or configuration files without symlink protection. If a malicious repository places those files as symlinks, local PDM operations can overwrite the symlink targets.\n\nThis creates an arbitrary file clobber primitive relative to the privileges of the invoking user.\n\n## Affected Behavior\n\n- Project-local config writes can affect files outside the repository\n- The most stable demonstrated sink is `pdm.toml`\n- Related sinks include `.pdm-python` and `.python-version`\n\n## Affected Code\n\n- `src/pdm/project/config.py:303-350`\n- `src/pdm/project/core.py:209-217`\n- `src/pdm/cli/commands/use.py:187-189`\n\n## Technical Details\n\n`Config.__init__()` resolves the project-local `pdm.toml` path and `_save_config()` writes to the resolved target. If `PROJECT_ROOT/pdm.toml` is a symlink to another file, `pdm config -l ...` updates the target file instead of refusing the write.\n\nThe same general problem exists for other project-local persistence paths that are written directly with no `lstat` / `O_NOFOLLOW` protection.\n\nFor the `pdm.toml` PoC specifically, the target file must already contain parseable TOML. Otherwise the load step fails before the write path is reached. That parser constraint does not apply to the `.pdm-python` or `.python-version` sinks.\n\n## Impact\n\n- Arbitrary file clobber as the invoking user\n- Destructive modification of local files outside the repository root\n- Useful primitive for privilege abuse when `pdm` is run in elevated contexts\n\n## Reproduction\n\nPoC:\n\n```bash\n# Replace this with a Python interpreter that can run `python -m pdm`.\nPDM_PY=/path/to/python-with-pdm\ntmpdir=$(mktemp -d)\ntarget=\"$tmpdir/clobbered-target.toml\"\n\ncat \u003e \"$target\" \u003c\u003c\u0027EOF\u0027\n[seed]\nvalue = 1\nEOF\n\nln -s \"$target\" \"$tmpdir/pdm.toml\"\n\ncat \u003e \"$tmpdir/pyproject.toml\" \u003c\u003c\u0027EOF\u0027\n[project]\nname = \"symlink-clobber-demo\"\nversion = \"0.0.1\"\nEOF\n\n(\n  cd \"$tmpdir\" \u0026\u0026\n  \"$PDM_PY\" -m pdm config -l venv.in_project false\n)\n\ncat \"$target\"\n```\n\nExpected result:\n\n- A temporary project is created\n- `pdm.toml` is a symlink to another TOML file\n- Running `pdm config -l venv.in_project false` modifies the symlink target\n\nObserved output from local validation:\n\n```text\n--- target ---\n[seed]\nvalue = 1\n\n[venv]\nin_project = false\n```\n\n## Severity\n\nMedium\n\n## CVSS v4.0\n\n- Base score: `6.8` (`Medium`)\n- Vector: `CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N`\n\nRationale:\n\n- `AV:L`: exploitation requires local execution of `pdm` against an attacker-prepared checkout\n- `AC:L`: there is no complex constraint once the symlink sink exists\n- `AT:N`: no extra prerequisite beyond the victim running the relevant command is required\n- `PR:N`: the attacker does not need prior privileges on the victim system\n- `UI:A`: the victim must actively run a command that writes project-local state or config\n- `VC:N`: the demonstrated issue is a write primitive, not a direct read primitive\n- `VI:H`: the attacker can cause unauthorized modification of files outside the repository root\n- `VA:L`: file clobber can disrupt local operation, but direct same-step availability impact is lower than a full RCE\n- `SC:N/SI:N/SA:N`: the base score is limited to the directly affected system\n\n## Root Cause\n\nProject-local file sinks are treated as trusted regular files and are written without symlink checks or guarded atomic replacement.\n\n## Recommended Remediation\n\n- Refuse to write project-local config/state files when the destination is a symlink\n- Use `lstat` and `O_NOFOLLOW` where available\n- Avoid resolving attacker-controlled project-local paths before writing\n- Use atomic temp-file replacement only after confirming the destination is a regular file\n\n## Disclosure Notes\n\nThis issue is independent from the code-execution issues above. It is best tracked as a separate CVE candidate because the root cause and remediation are different.",
  "id": "PYSEC-2026-2862",
  "modified": "2026-07-13T16:05:29.440146Z",
  "published": "2026-07-13T15:46:16.027754Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pdm-project/pdm/security/advisories/GHSA-ghq2-5c67-fprm"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pdm-project/pdm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pdm-project/pdm/releases/tag/2.27.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/pdm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-ghq2-5c67-fprm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47763"
    }
  ],
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PDM: Project-Local State and Config Writes Follow Symlinks"
}