CVE Explorer
CVE-2026-48207
Deserialization of untrusted data in Apache Fory PyFory. PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if it deserializes attacker-controlled data using PyFory Python-native mode with strict mode disabled and relies on DeserializationPolicy to restrict unsafe classes, functions, or module attributes.
This issue affects Apache Fory: from before 1.0.0.
Mitigation: U
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://pypi.org/","defaultStatus":"unaffected","packageName":"pyfory","product":"Apache Fory","vendor":"Apache Software Foundation","versions":[{"lessThan":"1.0.0","status":"affected","version":"0.13.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:cdf0bb4af046cc88f3f4ca417cc08e5f510ee60f536f0dc5cccd66ad552e7c51 · sha256:5287400516d7cb3e… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:cdf0bb4af046cc88f3f4ca417cc08e5f510ee60f536f0dc5cccd66ad552e7c51 · sha256:5287400516d7cb3e… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:cdf0bb4af046cc88f3f4ca417cc08e5f510ee60f536f0dc5cccd66ad552e7c51 · sha256:5287400516d7cb3e… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/05/21/10"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cdf0bb4af046cc88f3f4ca417cc08e5f510ee60f536f0dc5cccd66ad552e7c51 · sha256:5287400516d7cb3e… · /containers/adp/1/references/0
{"tags":["vendor-advisory"],"url":"https://fory.apache.org/security/#cve-2026-48207-pyfory-reduceserializer-deserializationpolicy-bypass"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cdf0bb4af046cc88f3f4ca417cc08e5f510ee60f536f0dc5cccd66ad552e7c51 · sha256:5287400516d7cb3e… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.