CVE-2026-40323SP1 V6 Recursion Circuit Row-Count Binding Gap
Updated under an hour ago ()
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It affects succinctlabs sp1 and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.9 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-345, CWE-354
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Apr 20, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
succinctlabs sp1 succinctlabs:sp1 (from the name) | from 6.0.0, < 6.1.0 | CNA record |
succinct sp1 succinct:sp1 | from 6.0.0 before 6.1.0 | NVD |
References
- https://github.com/succinctlabs/sp1/security/advisories/GHSA-63x8-x938-vx33x-refsource-confirm, vendor-advisory
- https://github.com/succinctlabs/sp1/releases/tag/v6.1.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.