Vulnerability · CVE-2026-40323
SP1 is a zero‑knowledge virtual machine that proves the correct execution of programs compiled for the RISC-V architecture.
Published Apr 18, 2026 · catalog updated Jun 17, 2026 · SP1 is a zero‑knowledge
Check if you run it
No confirmed exploitation is on record for CVE-2026-40323. EPSS is 0.22%. Act only if a listed version of SP1 is a zero‑knowledge is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (SP1 is a zero‑knowledge).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High8.9
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.22%
- Remediation
- Advisory link
- Affected products
- cpe succinct/sp1
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe succinct/sp1version unspecified
How to fix CVE-2026-40323
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-40323. EPSS is 0.22%. Act only if a listed version of SP1 is a zero‑knowledge is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-345: Insufficient Verification of Data Authenticity; CWE-354. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 18, 2026 · NIST NVD
Detected
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.
Jun 17, 2026 · NIST NVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2026-40323
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-40323
30-day exploitation probability 0.2%
first.org - NIST NVDVulnerability recordCVE-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 f
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.