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vuln-cve/data/2026/24xxx/CVE-2026-24850.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-24850",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-01-27T14:51:03.060Z",
"datePublished": "2026-01-28T00:24:53.146Z",
"dateUpdated": "2026-01-28T14:54:22.827Z"
},
"containers": {
"cna": {
"title": "ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-347",
"lang": "en",
"description": "CWE-347: Improper Verification of Cryptographic Signature",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9"
},
{
"name": "https://github.com/RustCrypto/signatures/issues/894",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/RustCrypto/signatures/issues/894"
},
{
"name": "https://github.com/RustCrypto/signatures/pull/895",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/RustCrypto/signatures/pull/895"
},
{
"name": "https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a"
},
{
"name": "https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38"
},
{
"name": "https://csrc.nist.gov/pubs/fips/204/final",
"tags": [
"x_refsource_MISC"
],
"url": "https://csrc.nist.gov/pubs/fips/204/final"
},
{
"name": "https://datatracker.ietf.org/doc/html/rfc9881",
"tags": [
"x_refsource_MISC"
],
"url": "https://datatracker.ietf.org/doc/html/rfc9881"
},
{
"name": "https://github.com/C2SP/wycheproof",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/C2SP/wycheproof"
},
{
"name": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json"
},
{
"name": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json"
},
{
"name": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json"
}
],
"affected": [
{
"vendor": "RustCrypto",
"product": "signatures",
"versions": [
{
"version": ">= 0.0.4, < 0.1.0-rc.4",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-01-28T00:24:53.146Z"
},
"descriptions": [
{
"lang": "en",
"value": "The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto `ml-dsa` crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be **strictly increasing**. The current implementation uses a non-strict monotonic check (`<=` instead of `<`), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict `<` comparison to `<=`, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue."
}
],
"source": {
"advisory": "GHSA-5x2r-hc65-25f9",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-01-28T14:53:25.394412Z",
"id": "CVE-2026-24850",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"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": "2026-01-28T14:54:22.827Z"
}
}
]
}
}