Is yansongda/pay affected by CVE-2026-33661?

Packagist yansongda/pay is affected in <3.7.20.

Is CVE-2026-33661 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

high

CVE-2026-33661

Q: Is CVE-2026-33661 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

Packagist · yansongda/pay

Summary

WeChat Pay callback signature verification bypassed when Host header is localhost

Severity: high
EPSS: 0.5% (p39)
Also known as: GHSA-q938-ghwv-8gvc
Published: 2026-03-25

References

https://github.com/yansongda/pay/security/advisories/GHSA-q938-ghwv-8gvc
https://nvd.nist.gov/vuln/detail/CVE-2026-33661
https://github.com/yansongda/pay/commit/26987ebf789f1e7f0a85febb640986ab4289fd7f

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.