Critical
Cap-go - OTP Bypass via Response Manipulation in Email Verification
Type: advisorySources: OSV
Cap-go before 12.128.2 contains an authentication bypass vulnerability in OTP verification that allows attackers to bypass email verification by modifying server responses. Attackers can intercept OTP verification requests and manipulate HTTP responses to falsely mark verification successful, enabling unauthorized 2FA enablement and account takeover.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-56073
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 19:29 UTC · Revision 1
Source evidence
Cap-go - OTP Bypass via Response Manipulation in Email Verification
core-osv · Original sourcePublished 19 Jun 2026, 21:39 UTC
Cap-go before 12.128.2 contains an authentication bypass vulnerability in OTP verification that allows attackers to bypass email verification by modifying server responses. Attackers can intercept OTP verification requests and manipulate HTTP responses to falsely mark verification successful, enabling unauthorized 2FA enablement and account takeover.
osv:CVE-2026-56073
Complete source record
{
"id": "c24c7d94e5b07d1aa55172972dd7a01e4ff7a72338a6f6704a6daacc2234a49f",
"url": "https://osv.dev/vulnerability/CVE-2026-56073",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Cap-go - OTP Bypass via Response Manipulation in Email Verification",
"summary": "Cap-go before 12.128.2 contains an authentication bypass vulnerability in OTP verification that allows attackers to bypass email verification by modifying server responses. Attackers can intercept OTP verification requests and manipulate HTTP responses to falsely mark verification successful, enabling unauthorized 2FA enablement and account takeover.",
"evidence": "osv:CVE-2026-56073",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-56073",
"aliases": [
"CVE-2026-56073",
"GHSA-x2gq-85v8-j9v4"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/Cap-go/capgo.app",
"type": "GIT",
"events": [
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{
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"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56073.json"
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}
],
"modified": "2026-10-28T02:30:31.675569057Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56073.json",
"https://github.com/Cap-go/capgo/security/advisories/GHSA-x2gq-85v8-j9v4",
"https://nvd.nist.gov/vuln/detail/CVE-2026-56073",
"https://www.vulncheck.com/advisories/cap-go-otp-bypass-via-response-manipulation-in-email-verification"
],
"provider_metadata": {
"cwe_ids": [
"CWE-345"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56073.json"
}
},
"related_cves": [
{
"value": "CVE-2026-56073",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 498724,
"published_at": "2026-06-19T21:39:18.855+00:00"
}