clean.sol

VSS-20260923-G2S1GFNZ · generated Sep 23, 2026, 2:22 PM

Trust score

Run another scan Request Private Review (report id only)

Strong surface · automated4 findingsPasted source1 warningsemgrep 1.163.0

Verdict is derived from severity counts via the same deterministic formula every VegaSec report uses. clean.sol was scanned from pasted source. This is static-analysis triage, not a certification or formal audit attestation.

Signature

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This report has no signature. It was persisted before report signing shipped, so nobody can prove authorship for it, including us. The bytes can still be hashed to check that they did not change.

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PDF artifact

Queued artifact pipeline · not blocking on the scan

Not requested

No PDF artifact has been requested for this report yet. The HTML report and the Markdown export already carry the full disclaimer and limitations inline. PDF synthesis is a queued artifact, not part of the scan path.

Status endpoint

GET /report/solidity/VSS-20260923-G2S1GFNZ/export.pdf

Solidity evidence report

4 audit findings

medium: 0informational: 0

Severity distribution

Executive summary

4 findings surfaced (0 critical, 0 high, 1 medium, 0 low, 3 informational).
No critical or high severity findings; medium and low signals still require operator review before public promotion.
Automated static analysis only. A human operator review has not been attached to this report.

Warnings (1)

· Unmapped detector slither:immutable-states — classified as 'other'

semgrep 1.163.0

mediumUnchecked callConfidence: unknownExploitability: unknownDetector: semgrep
Low-level .call to an externally-controlled target
Affected location
clean.sol:21
Detector / source
semgrep · semgrep:vegasec-low-level-call-untrusted
Evidence
Low-level .call to an externally-controlled target. Combined with reentrancy or unchecked return values, this is a common fund-draining pattern.
Exploitability notes
Analyzer did not report a confidence level; treat as unverified until reviewed.
Remediation
Check the boolean return of low-level call/delegatecall/send and revert on failure with a descriptive reason string.
Limitations
- Analyzer did not report confidence; fail closed and treat the finding as unverified.
- Static analysis did not prove exploitability; do not present this as an exploit claim.
- Analyzer output did not include a source excerpt for this finding.
Detector docs ↗
informationalLogicConfidence: highExploitability: lowDetector: slither
Version constraint 0.8.19 contains known severe issues (https://solidity.readthedocs.io/en/latest/bugs.html)
Affected location
clean.sol:1 · 0.8.19
Detector / source
slither · slither:solc-version
Evidence
Version constraint 0.8.19 contains known severe issues (https://solidity.readthedocs.io/en/latest/bugs.html) - VerbatimInvalidDeduplication - FullInlinerNonExpressionSplitArgumentEvaluationOrder - MissingSideEffectsOnSelectorAccess. It is used by: - 0.8.19 (clean.sol#1)
Exploitability notes
Informational signal; not directly exploitable without additional context.
Remediation
Re-derive the business rule by hand, write a property-based test that fails on the current path, and only then fix the implementation.
Limitations
- High analyzer confidence, still requires source-level review before promotion.
- Direct exploitability is not established; keep the signal as a remediation/checklist item.
- Analyzer output did not include a source excerpt for this finding.
Detector docs ↗
informationalOtherConfidence: highExploitability: lowDetector: slither
CleanVault.owner (clean.sol#8) should be immutable
Affected location
clean.sol:8 · owner
Detector / source
slither · slither:immutable-states
Evidence
CleanVault.owner (clean.sol#8) should be immutable
Exploitability notes
Informational signal; not directly exploitable without additional context.
Remediation
Review the detector output against the source manually; if exploitable, design a fix and add a regression test before deploying.
Limitations
- High analyzer confidence, still requires source-level review before promotion.
- Direct exploitability is not established; keep the signal as a remediation/checklist item.
- Analyzer output did not include a source excerpt for this finding.
Detector docs ↗
informationalUnchecked callConfidence: highExploitability: lowDetector: slither
Low level call in CleanVault.withdraw(uint256) (clean.sol#18-23):
Affected location
clean.sol:18-23 · withdraw
Detector / source
slither · slither:low-level-calls
Evidence
Low level call in CleanVault.withdraw(uint256) (clean.sol#18-23): - (ok,None) = msg.sender.call{value: amount}() (clean.sol#21)
Exploitability notes
Informational signal; not directly exploitable without additional context.
Remediation
Check the boolean return of low-level call/delegatecall/send and revert on failure with a descriptive reason string.
Limitations
- High analyzer confidence, still requires source-level review before promotion.
- Direct exploitability is not established; keep the signal as a remediation/checklist item.
- Analyzer output did not include a source excerpt for this finding.
Detector docs ↗

Limitations

VegaSec runs static analysis only. Findings can include false positives, miss patterns the configured detectors do not cover, and never replace manual auditor judgement.
Scan ran slither and semgrep against a single sandboxed copy of the source. Multi-file dependency analysis beyond what slither resolves automatically is out of scope.
Some detectors emitted warnings (see `warnings`); their output was still ingested but should be read with extra care.
This report is not a certification, audit attestation, or financial advice.

Exploit reasoning

Reference-grade reasoning tied to evidence

ef8f5683d7cd6b67fe504e7782795517878c6b18d6fbf549ba2b228c070b329e · unchecked-callmedium
Not determined
Question: Is this finding exploitable in this specific contract?
Reason: Analyzer confidence or exploitability is unknown; the narrative would overclaim without operator review.

Audit pipeline

Audit cockpit

Honest stage-by-stage view of what VegaSec ran against this contract. Automated stages do not replace a human operator review.

Passed: 3Partial: 5Blocked: 1

Audit intake
Passed320ms replay2:22 PM
Normalize the submitted contract target and confirm it can enter the Solidity audit lane.
Next: Acquire verified source or scan the pasted Solidity source.
Source acquisition
Passed1.4s replay2:22 PM
Resolve pasted source or verified explorer source without treating malformed input as demo data.
Next: Validate the analyzer toolchain against the acquired source.
03
Toolchain validation
Partial2.3s replay2:22 PM
Confirm the configured static analyzers can run and produce parseable output.
Next: Run static analysis and capture raw detector evidence.
- One or more analyzers emitted warnings; report findings remain usable but should be read with limitations.
04
Static analysis
Partial4 findings8.8s replay2:22 PM
Run static analyzers against the sandboxed source and collect raw detector evidence.
Next: Normalize detector output into one deduped finding set.
- One or more analyzers emitted warnings; report findings remain usable but should be read with limitations.
Finding normalization
Passed4 findings1.1s replay2:22 PM
Dedupe detectors, classify vulnerability classes and compute severity-weighted risk.
Next: Review exploitability conservatively against confidence and limitations.
06
Exploitability review
Partial4 findings1.9s replay2:22 PM
Frame automated findings with conservative exploitability and limitation notes.
Next: Draft remediation notes from the normalized evidence.
- Automated exploitability review is conservative and does not replace a manual exploitability assessment.
07
Remediation draft
Partial4 findings1.5s replay2:22 PM
Prepare remediation-oriented evidence for the shareable report artifact.
Next: Attach an operator review artifact before claiming human review.
- Remediation notes are generated from detector evidence and require project-specific engineering review.
08
Operator review
Blocked0ms replay2:22 PM
Record whether a human operator artifact exists before buyer escalation.
Next: Attach a real operator review artifact before claiming human review.
- No operator review artifact is attached to this automated scan.
- Human operator review has not been attached to this automated scan yet.
09
Finalization
Partial4 findings620ms replay2:22 PM
Publish the automated report artifact or explain why the scan failed closed.
Next: Share the report with explicit limitations and review state.
Artifact: Automated Solidity report · solidity-2f746d702f766567
- Final report is an automated static-analysis artifact; no operator review artifact is attached.

Report badges

Verified sourceCommunity watch

Badges describe the evidence carried by this report artifact, not financial value or future pricing. Operator-reviewed is never granted automatically.

How to read this report

Score, confidence, ranking: four moving parts, no hand-tuning.

Generated Sep 23, 2026, 2:22 PM · Solidity · clean.sol

Score bands

0-19
AVOID-style triage
Multiple high or critical findings, low source confidence, or unverified context. Public action should pause until a Private Review or a re-scan with better evidence.
20-49
High caution
Notable findings or thin evidence. Worth a Private Review before relying on the artifact.
50-69
Watch
Mixed signals: some evidence, some gaps. Re-scan after material changes to the target.
70-89
Clear surface (automated)
No critical or high findings via static analysis. Not a safety claim: human review is still recommended for diligence work.
90-100
Strong surface (automated) · this report
No critical or high findings, verified source, and high source confidence. Not a safety claim: human review is still recommended for diligence work.

Score: Deterministic 0-100 derived from severity counts. Same formula across every report. Lower means more risk.
Confidence: Separate axis. Measures how much VegaSec trusts the input data. Low confidence pushes the verdict toward UNKNOWN; the two are never collapsed into one number.
Ranking / percentile: Only meaningful within the eligible Trust Index set. Shown on /trust-index when the eligible pool is large enough. Today the public index is a controlled preview.

Private Review is separate

A paid Private Review does not raise the public score on this report. Public score reflects public-source evidence only. Private Review adds operator attestation and a confidential memo, never a score bump.

Export and share

· Shareable public URL: copy from the report actions panel.
· Markdown export: every export carries the report id, target, verdict, generated timestamp, and the public-data disclaimer.
· PDF export: not in this MVP. Tracked as a follow-up. The Markdown export contains the same content and prints cleanly to PDF from a browser today.

Source provenance

This report scanned a Solidity source provided directly by the submitter (paste). No on-chain address is associated.

Scanned source (879 chars)

pragma solidity 0.8.19;

// Sonde A (controle): contrato simples, sem padrão vulnerável conhecido.
// Esperado DEPOIS do corte por cobertura: cobertura completa, 0 findings, veredito limpo,
// score 100 — ou seja, prova de que o fix não degradou o caminho felizado.
contract CleanVault {
    mapping(address => uint256) private balances;
    address public owner;

    constructor() {
        owner = msg.sender;
    }

    function deposit() external payable {
        balances[msg.sender] += msg.value;
    }

    function withdraw(uint256 amount) external {
        require(balances[msg.sender] >= amount, "insufficient");
        balances[msg.sender] -= amount;
        (bool ok, ) = msg.sender.call{value: amount}("");
        require(ok, "transfer failed");
    }

    function balanceOf(address who) external view returns (uint256) {
        return balances[who];
    }
}

Public-data disclaimer

Solidity scans are triage based on slither + semgrep static analysis. Output is not a certification, audit attestation or financial advice. Findings can include false positives and may miss patterns the configured detectors do not cover.