PYSEC-2026-491
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/pyfury/PYSEC-2026-491.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-491
- Aliases
- Published
- 2026-06-29T11:50:37.028397Z
- Modified
- 2026-07-01T20:23:02.702735Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Apache Pyfory python is vulnerable to deserialization of untrusted data
- Details
-
Deserialization of untrusted data in python in pyfory versions 0.12.0 through 0.12.2, or the legacy pyfury versions from 0.1.0 through 0.10.3: allows arbitrary code execution. An application is vulnerable if it reads pyfory serialized data from untrusted sources. An attacker can craft a data stream that selects pickle-fallback serializer during deserialization, leading to the execution of
pickle.loads, which is vulnerable to remote code execution.Users are recommended to upgrade to pyfory version 0.12.3 or later, which has removed pickle fallback serializer and thus fixes this issue.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2025-61622
- https://github.com/apache/fory/pull/2629
- https://github.com/apache/fory/commit/379b948ecae5c3b849e5bdb3997978c9a163e40b
- https://github.com/apache/fory
- https://github.com/apache/fory/releases/tag/v0.12.3
- https://lists.apache.org/thread/vfn9hp9qt06db5yo1gmj3l114o3o2csd
- http://www.openwall.com/lists/oss-security/2025/09/29/3
- https://pypi.org/project/pyfury
- https://github.com/advisories/GHSA-538v-3wq9-4h3r
Affected packages
PyPI / pyfury
Package
- Name
- pyfury
- View open source insights on deps.dev
- Purl
- pkg:pypi/pyfury