{"cve":"CVE-2026-53956","nvd":{"published":"2026-09-09T21:17:03.180","modified":"2026-09-10T15:53:23.707","status":"Deferred","description":"Rattler is a library that provides common functionality used within the conda ecosystem. `rattler_cache` prior to version 0.9.0 and `py-rattler` prior to version 0.24.0 were vulnerable to package-cache path traversal when handling package metadata from conda channels. During cache materialization, the `ratter_cache` code used the package record `build` string as part of a cache key that was joined into a filesystem path. A malicious or untrusted channel could publish repodata with path separators or traversal components in that field, causing package contents to be written outside the configured package cache directory. The issue requires use of a malicious or otherwise untrusted conda channel. Curated channels that validate package metadata are not expected to allow malformed build strings of this form. Users should upgrade to `rattler_cache` version 0.9.0 or `py-rattler` version 0.24.0 and avoid untrusted conda channels.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","score":5.4},"cwes":["CWE-22","CWE-73"],"references":["https://github.com/conda/rattler/security/advisories/GHSA-h672-p7h7-97v9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:53.108888569+00:00"},"epss":{"cve":"CVE-2026-53956","score":0.0033,"percentile":0.26169,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-h672-p7h7-97v9","url":"https://osv.dev/vulnerability/GHSA-h672-p7h7-97v9","summary":"Rattler vulnerable to package cache path traversal via conda package build string","modified":"2026-07-13T16:42:34.739131724Z","packages":[{"ecosystem":"crates.io","name":"rattler_cache","purl":"pkg:cargo/rattler_cache","ranges":["<0.9.0"],"fixed":["0.9.0"]},{"ecosystem":"PyPI","name":"py-rattler","purl":"pkg:pypi/py-rattler","ranges":["<0.24.0"],"fixed":["0.24.0"]}]},{"id":"PYSEC-2026-2970","url":"https://osv.dev/vulnerability/PYSEC-2026-2970","summary":"Rattler vulnerable to package cache path traversal via conda package build string","modified":"2026-07-13T16:33:07.841327527Z","packages":[{"ecosystem":"PyPI","name":"py-rattler","purl":"pkg:pypi/py-rattler","ranges":["<0.24.0"],"fixed":["0.24.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}