StableLib Ed25519 Signature Malleability via Missing S < L Check
# Ed25519 Signature Malleability via Missing S < L Check -- Same Class as node-forge CVE-2026-33895 (CWE-347) ## Target - Repository: StableLib/stablelib (package: @stablelib/ed25519) - Platform: GitHub PVR - Bounty: CVE credit - CWE: CWE-347 (Improper Verification of Cryptographic Signature) - Version: 2.0.2 (latest, 2026-03-28) ## Root Cause The `verify()` function in `@stablelib/ed25519` does not check that the `S` component of the signature is less than the group order `L`. Per CFRG recommendations and the ZIP-215 specification, Ed25519 implementations should reject signatures where `S >= L` to prevent signature malleability. When `S
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