SP1 V6 Recursion Circuit Row-Count Binding Gap
Published Apr 17, 2026
8.9
HIGHCVSS 4.0
EPSS 0.22%
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.
Affected products
-
- Version >= 6.0.0, < 6.1.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Succinctlabs | Sp1 | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Apr 20, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Apr–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.22% (0.00219) | 11.20th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.19% (0.00195) | 9.35th | v5 (v2026.06.15) |
| Apr 18, 2026 | 0.03% (0.00031) | 8.69th | v4 (v2025.03.14) |
References (4)
- https://github.com/advisories/GHSA-63x8-x938-vx33 Advisory
- https://github.com/succinctlabs/sp1/releases/tag/v6.1.0 x_refsource_MISCRelease Notes
- https://github.com/succinctlabs/sp1/security/advisories/GHSA-63x8-x938-vx33 x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-40323
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-63x8-x938-vx33 | Advisory | |
| https://github.com/succinctlabs/sp1/releases/tag/v6.1.0 | x_refsource_MISCRelease Notes | |
| https://github.com/succinctlabs/sp1/security/advisories/GHSA-63x8-x938-vx33 | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-40323 |
Change history (0)
No recorded changes yet.