PT-2026-5048 · Ml-Dsa · Ml-Dsa

Orenyomtov · Published 2026-01-28 · Updated 2026-01-28 · CVE-2026-24850

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions ML-DSA crate versions 0.0.4 through 0.1.0-rc.4

Description The ML-DSA crate, a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA), contains a flaw in its signature verification implementation. Versions starting from 0.0.4 and before 0.1.0-rc.4 incorrectly accept signatures with repeated hint indices. The ML-DSA specification requires hint indices within each polynomial to be strictly increasing, but the implementation uses a non-strict monotonic check, allowing duplicate indices. This is a regression introduced by a change from a strict comparison (<) to a non-strict comparison (<=) in version 0.0.4.

Recommendations Update to version 0.1.0-rc.4 or later.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-24850

GHSA-5X2R-HC65-25F9

Affected Products

Ml-Dsa

References · 20

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24850.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-24850 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-5x2r-hc65-25f9 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-24850 · Security Note
• https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json · Note
• https://github.com/C2SP/wycheproof · Note
• https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json · Note
• https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json · Note
• https://github.com/RustCrypto/signatures · Note
• https://github.com/RustCrypto/signatures/issues/894 · Note
• https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a · Note
• https://github.com/RustCrypto/signatures/pull/895 · Note
• https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9 · Note
• https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38 · Note
• https://twitter.com/VulmonFeeds/status/2016448244755181582 · Twitter Post