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vuln-cve/data/2026/55xxx/CVE-2026-55174.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-55174",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-16T15:20:43.085Z",
"datePublished": "2026-09-30T15:49:10.453Z",
"dateUpdated": "2026-09-30T19:52:01.569Z"
},
"containers": {
"cna": {
"title": "UltrafastSecp256k1: ECDSA adaptor verification accepts non-adaptable pre-signatures due to missing DLEQ binding",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-345",
"lang": "en",
"description": "CWE-345: Insufficient Verification of Data Authenticity",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-347",
"lang": "en",
"description": "CWE-347: Improper Verification of Cryptographic Signature",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/shrec/UltrafastSecp256k1/security/advisories/GHSA-c7q2-gv3g-rgxm",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/shrec/UltrafastSecp256k1/security/advisories/GHSA-c7q2-gv3g-rgxm"
},
{
"name": "https://github.com/shrec/UltrafastSecp256k1/commit/5478ef566c6af91b48a45c0c61f161f5b1071981",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/shrec/UltrafastSecp256k1/commit/5478ef566c6af91b48a45c0c61f161f5b1071981"
},
{
"name": "https://github.com/shrec/UltrafastSecp256k1/releases/tag/v4.2.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/shrec/UltrafastSecp256k1/releases/tag/v4.2.0"
},
{
"name": "https://github.com/shrec/UltrafastSecp256k1/releases/tag/v4.2.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/shrec/UltrafastSecp256k1/releases/tag/v4.2.1"
}
],
"affected": [
{
"vendor": "shrec",
"product": "UltrafastSecp256k1",
"versions": [
{
"version": "< 4.2.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-09-30T15:49:10.453Z"
},
"descriptions": [
{
"lang": "en",
"value": "UltrafastSecp256k1 is a high-performance, multi-backend secp256k1 engine with reproducible audit evidence, compatibility shims, and profile-based review scopes. Prior to version 4.2.0, UltrafastSecp256k1's ECDSA adaptor pre-signature verification accepts forged adaptor pre-signatures whose \"r\" value is not cryptographically bound to the adaptor point \"T\". This issue has been patched in version 4.2.0."
}
],
"source": {
"advisory": "GHSA-c7q2-gv3g-rgxm",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/shrec/UltrafastSecp256k1/security/advisories/GHSA-c7q2-gv3g-rgxm",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-30T19:51:52.522461Z",
"id": "CVE-2026-55174",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-30T19:52:01.569Z"
}
}
]
}
}