CVE-2026-71537: Paymenter has a credit-refund double-spend race condition in service downgrade (doUpgrade)

medium Affects paymenter/paymenter. Feed 2026.10.29.1, updated 2026-10-28; published 2026-09-18.

Paymenter has a credit-refund double-spend race condition in service downgrade (doUpgrade)

Package: paymenter/paymenter Composer
Affected versions: <1.5.7
Fixed in: 1.5.7
Severity: medium CVSS 6.5
Exploitation: not on CISA KEV · EPSS 0% (25.5th percentile)
Published: 2026-09-18
Source: osv.dev

References

NVD record paymenter/paymenter advisories

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