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CVE-2026-61618
Published:October 30, 2026
Updated:November 04, 2026
SNARK Verifier is a generic (S)NARK verifier. Prior to 0.2.5, KZG accumulator public-instance limbs are decoded without consistently enforcing canonical limb bounds before elliptic-curve coordinate reconstruction. "PlonkProof::read" selects scalars using "accumulator_indices" and passes them to "AccumulatorEncoding::from_repr". For the EVM loader, "LimbsEncoding::from_repr" forwards them to "EvmLoader::ec_point_from_limbs" in "snark-verifier/src/loader/evm/loader.rs", where "shl" and "add" reconstruct coordinates before "validate_ec_point" checks the resulting affine point rather than the original limb bounds. The related native path in "snark-verifier/src/pcs/kzg/accumulator.rs" can reach assertion- or unwrap-based decoding and panic instead of returning a verification error. This allows noncanonical encodings at the verifier boundary and can crash the native verifier. Standard SDK aggregation circuits are expected to constrain accumulator limbs before this boundary, which limits practical exploitability. This issue is fixed in version 0.2.5.
Affected Packages
https://github.com/axiom-crypto/snark-verifier.git (GITHUB):
Affected version(s) >=v0.1.1 <v0.2.5 || >=v2022_10_14 <v0.2.5
Fix Suggestion:
Update to version v0.2.5
snark-verifier (RUST):
Affected version(s) >=0.1.6 <0.2.6
Fix Suggestion:
Update to version 0.2.6
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Input Validation
EPSS
Base Score:
0.37