{
    "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"
                }
            }
        ]
    }
}