ModSecurity: Unsigned integer underflow in @verifySSN / @verifyCPF / @verifySVNR operators
Published May 12, 2026 · Updated Oct 23, 2026 · Also known as BIT-modsecurity-2026-42268, GHSA-vwr3-7x7g-7p9w, BIT-modsecurity2-2026-42268
Original summary
Normalized public record · Updated Oct 23, 2026
ModSecurity: Unsigned integer underflow in @verifySSN / @verifyCPF / @verifySVNR operators
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 to before 3.0.15, there is an unhandled exception (std::out_of_range) caused by unsigned integer underflow in libmodsecurity3 if the user (administrator) uses a rule any of @verifySSN, @verifyCPF, or @verifySVNR. This vulnerability is fixed in 3.0.15.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- BIT-modsecurity-2026-42268, GHSA-vwr3-7x7g-7p9w, BIT-modsecurity2-2026-42268
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published May 12, 2026 · Last refreshed Oct 23, 2026