{"data":{"id":"98e72264-c85d-46db-b6ed-31f741d5e4c1","title":"ECHO: Replacing the Compliance Proxy with Response Harmfulness in Optimization-Based Jailbreak Attack","summary":"ECHO is an optimization-based jailbreak attack that replaces the usual token-level compliance proxy with response-level, continuous harmfulness scores from HarmSig, a 1.7B regressor. It pairs this with five word-level perturbation operators and Keyword-Anchored Beam Search under a strict black-box threat model. Across five open-weight victims on AdvBench, it reaches up to 0.898 StrongREJECT mean score and 89.23% HarmBench success.","solution":"N/A -- no mitigation discussed in source.","labels":["security","research"],"sourceUrl":"https://arxiv.org/abs/2610.23030v1","publishedAt":"2026-10-16T07:07:08.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":["jailbreak"],"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":"2026-10-16T07:07:08.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"advanced","impactType":["safety"],"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":"preprint","atlasIds":["AML.T0054"]}}