Evidence · DiggingBeagle record
When Feedback Becomes a Backdoor: Skill Optimization Poisoning
Research on malicious rules promoted from contaminated training feedback.
- Published
- Nov 7, 2026
- Source role
- primary disclosure
Evidence record
Research on malicious rules promoted from contaminated training feedback.
Claim-level citations (3)
- supportsPoisoned reference answers became persistent agent skills in controlled tests: Authors contaminated a subset of training reference answers and tested whether the resulting skill preserved the attacker rule.
Threat model and experiment setup
- supportsPoisoned reference answers became persistent agent skills in controlled tests: Successful SearchQA triggers contrasted with failing ordinary SpreadsheetBench workbook attacks.
Section 5 Results and Failure Localization
- supportsPoisoned reference answers became persistent agent skills in controlled tests: In SearchQA, a retained poisoned Skill emitted the attacker response in 200 of 200 triggered tests; the natural SpreadsheetBench workbook attack recorded zero target successes in 120 trials.
Section 5.2, Tables 5 and 6: SearchQA and SpreadsheetBench outcomes