GHSA-Q53Q-5R4J-5729

Vulnerability from github – Published: 2026-06-01 14:15 – Updated: 2026-06-09 11:52
VLAI
Summary
rattler has an entry-point path traversal in noarch:python install (arbitrary file write)
Details

Summary

EntryPoint::FromStr in rattler_conda_types performs only .trim() on the command field before the linker joins it onto the install prefix and writes an executable Python script. A malicious noarch:python package can ship an info/link.json with an entry-point name containing .., /, \, or an absolute path; the resulting file is written outside the prefix (or clobbers an existing in-prefix entry-point such as bin/pip) with mode 0o775 on Unix and a copied launcher .exe on Windows. This affects the default install path of pixi install, rattler-build, some methods in py-rattler, and any other consumer of the rattler install crate; no flag or post-link-script opt-in is involved.

Resolved in https://github.com/conda/rattler/pull/2445, released in rattler 0.43.2.

Affected

  • Repository: https://github.com/conda/rattler
  • Commit: a0e61a33da8b9d6de712fab2a879fa9da977e6e3 (HEAD at audit time, 2026-05-13 release)
  • Downstream consumers reached through the same code path: prefix-dev/pixi @ e640477
  • pixi 0.69.0 and rattler-build 0.65.0 fix this issue

Researcher

Berkant Koc me@berkoc.com PGP: 0C588DFD76204987284213EA0AC529C41F8AA5D6

Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "rattler"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.43.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.23.2"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "py-rattler"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.24.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47425"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-73"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-01T14:15:31Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\n`EntryPoint::FromStr` in `rattler_conda_types` performs only `.trim()` on the `command` field before the linker joins it onto the install prefix and writes an executable Python script. A malicious `noarch:python` package can ship an `info/link.json` with an entry-point name containing `..`, `/`, `\\`, or an absolute path; the resulting file is written outside the prefix (or clobbers an existing in-prefix entry-point such as `bin/pip`) with mode `0o775` on Unix and a copied launcher `.exe` on Windows. This affects the default install path of `pixi install`, `rattler-build`, some methods in `py-rattler`, and any other consumer of the `rattler` install crate; no flag or post-link-script opt-in is involved.\n\nResolved in https://github.com/conda/rattler/pull/2445, released in rattler 0.43.2.\n\n## Affected\n\n- Repository: https://github.com/conda/rattler\n- Commit: `a0e61a33da8b9d6de712fab2a879fa9da977e6e3` (HEAD at audit time, 2026-05-13 release)\n- Downstream consumers reached through the same code path: `prefix-dev/pixi` @ `e640477`\n- pixi 0.69.0 and rattler-build 0.65.0 fix this issue\n\n## Researcher\n\nBerkant Koc \u003cme@berkoc.com\u003e\nPGP: 0C588DFD76204987284213EA0AC529C41F8AA5D6",
  "id": "GHSA-q53q-5r4j-5729",
  "modified": "2026-06-09T11:52:08Z",
  "published": "2026-06-01T14:15:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/conda/rattler/security/advisories/GHSA-q53q-5r4j-5729"
    },
    {
      "type": "WEB",
      "url": "https://github.com/conda/rattler/pull/2445"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/conda/rattler"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "rattler has an entry-point path traversal in noarch:python install (arbitrary file write)"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.