Unfaithful claims: breaking 6 zkVMs
osec.io | blog | #web3 | #vulnerability-research | #cryptography | #vulnerability | #zero-knowledge | #zkvm | #fiat-shamir | #soundness
Summary
OtterSec breaks soundness in six zkVMs — Jolt, Nexus, Cairo-M, Ceno, Expander, Binius64 — where unbound prover values let attackers prove false statements after seeing Fiat-Shamir challenges.
- Published
- Collected
--- id: 5667 title: "Unfaithful claims: breaking 6 zkVMs" source_domain: osec.io source_url: "https://osec.io/blog/zkvms-unfaithful-claims/" published_at: "2026-03-03T12:00:00Z" tags: ["web3", "vulnerability-research", "cryptography", "vulnerability", "zero-knowledge", "zkvm", "fiat-shamir", "soundness"] phying_url: "https://phying.com/item/5667" lang: en --- # Unfaithful claims: breaking 6 zkVMs ## Summary OtterSec breaks soundness in six zkVMs — Jolt, Nexus, Cairo-M, Ceno, Expander, Binius64 — where unbound prover values let attackers prove false statements after seeing Fiat-Shamir challenges. ## Intelligence Metadata - **Sources:** osec.io - **Published:** 2026-03-03T12:00:00Z - **Original:** https://osec.io/blog/zkvms-unfaithful-claims/ - **Phying News:** https://phying.com/item/5667