CVE-2026-40323

HIGH

SP1 V6 Recursion Circuit Row-Count Binding Gap

Title source: cna
STIX 2.1

Description

SP1 is a zero‑knowledge virtual machine that proves the correct execution of programs compiled for the RISC-V architecture. In versions 6.0.0 through 6.0.2, a soundness vulnerability in the SP1 V6 recursive shard verifier allows a malicious prover to construct a recursive proof from a shard proof that the native verifier would reject. Version 6.1.0 fixes the issue.

References (2)

Core 2
Core References

Scores

CVSS v3 7.5
EPSS 0.0019
EPSS Percentile 9.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-345 CWE-354
Status published
Products (5)
crates.io/sp1_prover 6.0.0 - 6.1.0crates.io
crates.io/sp1_recursion_circuit 6.0.0 - 6.1.0crates.io
crates.io/sp1_sdk 6.0.0 - 6.1.0crates.io
succinct/sp1 6.0.0 - 6.1.0
succinctlabs/sp1 >= 6.0.0, < 6.1.0
Published Apr 18, 2026
Tracked Since Apr 18, 2026