CVEs / CVE-2025-61622
CVE-2025-61622: Apache Software Foundation Apache Fory vulnerability
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 47.7% chance of exploitation in the next 30 days, higher than 98% of CVEs (8 Nov 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2025-61622
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apache Software Foundation Apache Fory | from 0.12.0, up to and including 0.12.2 | — |
| Apache Software Foundation Apache Fory | from 0.1.0, up to and including 0.10.3 | — |
| Product | Affected | Fixed in |
|---|---|---|
| pyfory (PyPI) | from 0.12.0, before 0.12.3 | 0.12.3 |
| pyfury (PyPI) | from 0.1.0, up to and including 0.10.3 | — |
Package versions from GHSA-538v-3wq9-4h3r.
Exploitation
Not in the CISA Known Exploited Vulnerabilities catalog as of 6 Nov 2026.
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA (134c704f-9b21-4f2e-91b3-4a467353bcc0) |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2025-61622 on NVD
- CVE-2025-61622 on OSV
- https://lists.apache.org/thread/vfn9hp9qt06db5yo1gmj3l114o3o2csd Issue Tracking, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/09/29/3 Mailing List, Third Party Advisory
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.