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CVE-2026-24850

5.3 · MEDIUM

The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA).

Published Jan 28, 2026CWE-347EPSS 0.34%

Overview

CVE-2026-24850 is a medium-severity vulnerability. It was published on January 28, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcsrc.nist.gov/pubs/fips/204/finalRefdatatracker.ietf.org/doc/html/rfc9881GitHubgithub.com/C2SP/wycheproofGitHubgithub.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.jsonGitHubgithub.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.jsonGitHubgithub.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.jsonGitHubgithub.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54aGitHubgithub.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38GitHubgithub.com/RustCrypto/signatures/issues/894GitHubgithub.com/RustCrypto/signatures/pull/895

How CyberStrike helps

Frequently asked questions

What is CVE-2026-24850?

CVE-2026-24850 is a medium-severity vulnerability. It was published on January 28, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-24850?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-24850?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-24850?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-24850 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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