{"data":{"id":"ca138b32-9b2b-4e43-8a34-eeed900d72f0","title":"Behavioral Forgetting Is Not Privacy in Machine Unlearning","summary":"This research argues that behavioral forgetting, measured only on a designated benchmark distribution, is an insufficient standard for privacy-oriented machine unlearning in large language models. In a controlled case study of cross-lingual querying across multiple multilingual model families, forgetting varied substantially when semantically equivalent information was queried in different languages and scripts. The authors conclude that a single access path can expose a real gap between behavioral forgetting and information inaccessibility.","solution":"N/A -- no mitigation discussed in source.","labels":["research","privacy"],"sourceUrl":"https://arxiv.org/abs/2610.21799v1","publishedAt":"2026-10-15T12:48:16.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":[],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-10-15T12:48:16.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality"],"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.9,"researchCategory":"preprint","atlasIds":null}}