CVE-2026-85531 Sipay OpenCart Virtual POS Module - Authentication Bypass

Sipay OpenCart Virtual POS Module >= 26.8.2 < 26.9.1 contains a signature spoofing vulnerability caused by improper cryptographic signature verification, letting attackers bypass signature validation, exploit requires crafted signature input.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.20% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-347

Vendor fix

Upgrade to version 26.9.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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