CVE-2026-40323

SP1 V6 Recursion Circuit Row-Count Binding Gap

State: Published
Severity: 8.9 High
Published: Apr 17, 2026
Updated: Apr 20, 2026
Reserved: Apr 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.9 High	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N	GitHub_M

Weaknesses

CWE-345 Insufficient Verification of Data Authenticity
CWE-354 Improper Validation of Integrity Check Value

Affected Products

Product	Versions
sp1succinctlabs	>= 6.0.0, < 6.1.0Affected

References

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