CVE-2026-40323: CWE-345: Insufficient Verification of Data Authenticity in succinctlabs sp1
CVE-2026-40323 is a high-severity vulnerability affecting succinctlabs sp1 versions 6. 0. 0 through 6. 0. 2. The issue involves insufficient verification of data authenticity in the SP1 V6 recursive shard verifier, allowing a malicious prover to create a recursive proof from a shard proof that the native verifier would reject. This compromises the soundness of the zero-knowledge virtual machine's proof verification. The vulnerability is fixed in version 6. 1. 0.
AI Analysis
Technical Summary
The vulnerability in succinctlabs sp1 (versions 6.0.0 to 6.0.2) is due to insufficient verification of data authenticity within the SP1 V6 recursive shard verifier component. This flaw permits a malicious prover to construct a recursive proof derived from a shard proof that would normally be rejected by the native verifier, undermining the soundness guarantees of the zero-knowledge virtual machine. The issue is resolved in version 6.1.0, which addresses this verification weakness.
Potential Impact
Successful exploitation allows an attacker to bypass the native verifier's rejection of invalid shard proofs, potentially leading to acceptance of incorrect or malicious proofs. This undermines the integrity and trustworthiness of the zero-knowledge proof system in sp1, which could affect applications relying on its correctness. There are no known active exploits in the wild at this time.
Mitigation Recommendations
Upgrade succinctlabs sp1 to version 6.1.0 or later, where this vulnerability is fixed. Since no official patch or alternative remediation is documented, applying the vendor's fixed version is the recommended action. Monitor vendor advisories for any additional guidance.
CVE-2026-40323: CWE-345: Insufficient Verification of Data Authenticity in succinctlabs sp1
Description
CVE-2026-40323 is a high-severity vulnerability affecting succinctlabs sp1 versions 6. 0. 0 through 6. 0. 2. The issue involves insufficient verification of data authenticity in the SP1 V6 recursive shard verifier, allowing a malicious prover to create a recursive proof from a shard proof that the native verifier would reject. This compromises the soundness of the zero-knowledge virtual machine's proof verification. The vulnerability is fixed in version 6. 1. 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in succinctlabs sp1 (versions 6.0.0 to 6.0.2) is due to insufficient verification of data authenticity within the SP1 V6 recursive shard verifier component. This flaw permits a malicious prover to construct a recursive proof derived from a shard proof that would normally be rejected by the native verifier, undermining the soundness guarantees of the zero-knowledge virtual machine. The issue is resolved in version 6.1.0, which addresses this verification weakness.
Potential Impact
Successful exploitation allows an attacker to bypass the native verifier's rejection of invalid shard proofs, potentially leading to acceptance of incorrect or malicious proofs. This undermines the integrity and trustworthiness of the zero-knowledge proof system in sp1, which could affect applications relying on its correctness. There are no known active exploits in the wild at this time.
Mitigation Recommendations
Upgrade succinctlabs sp1 to version 6.1.0 or later, where this vulnerability is fixed. Since no official patch or alternative remediation is documented, applying the vendor's fixed version is the recommended action. Monitor vendor advisories for any additional guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-10T21:41:54.505Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e2c0dabdfbbecc599fc03a
Added to database: 4/17/2026, 11:23:06 PM
Last enriched: 4/17/2026, 11:38:27 PM
Last updated: 4/18/2026, 7:03:06 AM
Views: 8
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.