CVE-2026-40323

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.

Score

CVSS 4.0 8.9 High

Status

Analyzed - security-advisories@github.com

Published

2026-04-18

Last modified

2026-10-26

Weaknesses

CWE-345, CWE-354

Affected products

• Sp1 (Succinct)
• Sp1 (Succinctlabs)

References

• https://github.com/succinctlabs/sp1/security/advisories/GHSA-63x8-x938-vx33
• https://github.com/succinctlabs/sp1/releases/tag/v6.1.0