CVE-2025-49843
CVE-2025-49843 is a low-severity vulnerability with a CVSS 4.0 base score of 2.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.
Key facts
- Severity: Low (CVSS 4.0 base score 2.7)
- EPSS exploit prediction: 1% (41st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-18564
- Weakness: CWE-276
- Published:
- Last modified:
Description
conda-smithy is a tool for combining a conda recipe with configurations to build using freely hosted CI services into a single repository. Prior to version 3.47.1, the travis_headers function in the conda-smithy repository creates files with permissions exceeding 0o600, allowing read and write access beyond the intended user/owner. This violates the principle of least privilege, which mandates restricting file permissions to the minimum necessary. An attacker could exploit this to access configuration files in shared hosting environments. This issue has been patched in version 3.47.1.
Frequently asked questions
- What is CVE-2025-49843?
- conda-smithy is a tool for combining a conda recipe with configurations to build using freely hosted CI services into a single repository. Prior to version 3.47.1, the travis_headers function in the conda-smithy repository creates files with permissions exceeding 0o600, allowing read and write access beyond the intended user/owner. This violates the principle of least privilege, which mandates restricting file permissions to the minimum necessary. An attacker could exploit this to access configuration files in shared hosting environments. This issue has been patched in version 3.47.1.
- How severe is CVE-2025-49843?
- CVE-2025-49843 has a CVSS 4.0 base score of 2.7, rated low severity.
- Is CVE-2025-49843 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-49843?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-49843 have an EU (EUVD) identifier?
- Yes. CVE-2025-49843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18564.
- When was CVE-2025-49843 published?
- CVE-2025-49843 was published on 2025-06-17 and last updated on 2026-06-17.
References
- https://github.com/conda-forge/conda-smithy/blob/1dc21086a476f6aeb6c1bad8bf58474bf3a8f8f0/conda_smithy/ci_register.py#L109-L111
- https://github.com/conda-forge/conda-smithy/commit/24cc0a55a363479e797c825be3a7f2603ef374a1
- https://github.com/conda-forge/conda-smithy/security/advisories/GHSA-h9v8-rrqg-3m95
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